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1. 13 25 NC not used 24 Please Note Following translations will be carried out using SEND2X Pin 2 14 gt GEO Z gt channel 2 Pin 4 16 gt GEO X gt channel 4 Pin 6 18 gt GEO Y gt channel 3 SEND GmbH MESO4g mnl 8 of 31 Marine Exploration Seismocorder GEOLON MES 3 7 Hydrophone The hydrophone input is fed into a 9 pin D SUB connector sockets l 5V sensor power supply differential hydrophone input into CS3302 15 MOhm to AGND differential hydrophone input into CS3302 15 MOhm to AGND sensor power supply unregulated 7 GUARD guard output for hydrophone cable shield 89 AGND analog ground 4 Error Indication If an error occurs during deployment an error log will be stored in non volatile memory Each log includes the time and date the task in which the error occurred and a brief error description If GEOLON is reset or if it is switched on after an error an error report is displayed following the sign on message After the report the user may choose to erase the report or retain it in non volatile memory for a later time by answering y or n to the prompt After the CLOSE or the DCFSKEW or GPSSKEW commands are executed to close an experiment all error messages are displayed and transferred to the internal hard disk SEND GmbH MES04g mnl 9 of 31 Marine Exploration Seismocorder GEOLON MES 5 PC Software The CD R with PC software contains the following programs SENDCOM S
2. PLUS Amplifies current signal by a factor of 2 MINUS Decreases current signal by factor of 2 REDRAW Redraws the screen use in case of display artefacts For the recorder MLS and MES the current status of the options will be displayed in the information field at the right side of the SHOW window Due to the maximum transfer rate of the data via the RS232 interface a time delay in the display of the signals can appear for sampling rates of about 500 Hz and higher depends on PC capability For these frequencies not all data can be displayed so a small time gap exists between two redraws of the screen Exiting the SHOW window and SENDCOM Please click on the X button on the right top corner of the window for closing the SHOW window To exit SENDCOM you can either click on the exit option in the file submenu or click on the X button on the right top corner of the SENDCOM window SEND GmbH MES04 mnl 12 of 31 Marine Exploration Seismocorder GEOLON MES 5 2 SEND2X This program package converts the compressed recordings of GEOLON MES into different formats SEND2X currently is available for the Linux operating system only Adaptations for other operating systems are under development The current version allows the conversion of raw data into a binary file an audio wave file or into the SEG Y format if an appropriate shot file is available On the delivered CD R you will find a program library and a script which includes
3. Please note that new operating system software and new firmware will not be installed automatically by the MES recorder Please consult the MES manual for details how to store these files from the internal harddrive to nonvolatile memory 1 1 13 binwrite This program has to be used to convert the data from internal send2x format into 32 bit binary format It reads the data via standard input and writes for each activated channel and each recording period sequence a file into a destination directory The filenames are generated automatically Corresponding to chapter 5 3 3 they consist of the recorder s serial number channel no sequence no and the date and time of recording start Furthermore each file will be marked by the extension ban Following options are important dest lt path destination directory gt This option defines the destination directory no head The application of no head suppresses the text header in the output file Otherwise a header of 1024 Byte will be written SEND GmbH send2x v261 mnl doc 11 07 2006 17 of 33 Manual SEND2X version 2 61 1 1 14 wavewrite As binwrite wavewrite also reads the data from standard input But now the data will be converted into a 16 bit PCM wave audio wave format and stored in a separate file for each channel The filenames will be generated automatically Corresponding to chapter 5 3 3 the filename consists of the recorder s serial number channel no se
4. SEC n2 gt MIN sets the recording duration in each period beginning at the starting point of the period INTERVAL closes the definition of a recording interval CONTINUOUS resets the interval definitions to allow continuous recording again Example EVERY 120 MIN FOR 10 SEC 20 MIN INTERVAL EXTERNAL prepares GEOLON for recording via the external trigger signal instead of via START and STOP time definitions This recording persists after execution of REC until END is executed for clarification Please note that GEOLON will remain in command mode until the REC command is executed When in recording mode data will be recorded as long as a high level on the trigger input Pin7 on the 15 pin Auxiliary connector is present GEOLON may record several events in sequence by activating and deactivating the trigger input Executing START STOP or ENDLESS will deactivate the trigger input again 6 6 Displaying Data With the following command the proper operation of the sensor electronics may be checked n SHOW displays data of channel n 1 4 on the PC using the program SENDCOM EXE C ctrl C will terminate the command If you activated the three geophone channels with 3 CHANNELS or GEOPHONE CHANNELS then you can choose 1 2 or 3 for n to select and show one of the geophone components on the screen While GEOLON is recording no data will be displayed during interval pauses For further information please see
5. 5 1 SENDCOM EXE SEND GmbH MESO4g mnl 19 of 31 Marine Exploration Seismocorder GEOLON MES 6 Time and Storage Services GEOLON has one internal oscillator from which all timing information 1s derived A 100 kHz signal derived from this oscillator can be compared and adjusted to an external reference oscillator via Pin6 of the 15 pin Auxiliary connector After power on GEOLON is not synchronised as far as time and date is concerned This can be accomplished using a DCF77 compatible pulse train Synchronisation will be maintained as long as the power supply is not interrupted for more than 15 seconds jay month year hour minute second SYNCHRONISE synchronises the internal clock to an external synchronisation pulse The pulse must be applied either to the DCF77 low to high transition or the DCF77 high to low transition input The time and date information entered as numbers before the command will be the time and date to which GEOLON will be set by the synchronisation pulse After time synchronisation has been finished FORMAT will be executed automatically Example A datum of 26 September 2003 16 05 30 o clock can be entered as 26 9 3 16 5 30 synchronise DCF77 synchronises the internal oscillator A DCF77 time pulse coded signal must be connected to either Pin10 active high or Pin3 active low of the 15 pin Auxiliary connector This synchronisation process may last up to 2 minutes due to the slow DCF77 pulse pattern Durin
6. 6 4 and 6 5 Otherwise data recording will be continued until either the harddisk is full or the battery almost empty In either case GEOLON will properly finish the recording by writing all data from the internal buffers to disk before shutting down The power consumption during shutdown is reduced to a minimum because only the internal time base 1s maintained Normally this still allows execution of a SKEW command later on To recover from shutdown mode the supply voltage has to be raised to nominal level SEND GmbH MES04 mnl 24 of 31 Marine Exploration Seismocorder GEOLON MES In addition the green LED on top between the RS232 and Auxiliary connector is sending different blinking signals according the stand alone status Meaning of signal continuous ON ready for operation access to harddisk and execution of commands he 0 continuous short 2 recording continuous long stop during recording 1 3 Data retrieval via external PC After the end of a measurement survey the GEOLON MES has to be connected to a DCF77 or GPS receiver via the auxiliary socket Then the serial link has to be established to your computer via the RS232 socket After that please start the program SENDCOM on your PC The command DCFSKEW determines the deviation of the internal oscillator compared to an external signal on the DCF77 or DCF77 input pins Alternatively GPSSKEW can be used with a valid GPS signal After determining the dev
7. 26 of 33 Manual SEND2X version 2 61 1 1 19 resample Data recorded with the GEOLON MLS and GEOLONON MTS or MTS M may show so called time slips due to differences between the long term stabilization of the internal clock and the sample frequency clock Thus within a given sample period less or more samples than required are recorded e g 99 samples instead of 100 If this misalignment of sample periods and samples actually collected 1s influencing the precision of your experiment you can correct the data using RESAMPLE RESAMPLE does not correct time slips for other GEOLON Data Loggers but may be helpful for correction of filter influences and adjusting skew times Usage resample v s size c seconds infile gt outfile or resample h V Options h Help Displays a list of all available options V Version Displays the version number of resample V Verbose Displays process information on stderr S Sets the size of the internal data buffer to size MB Default value is 16MB C Sets the time in seconds which must pass between consecutive time slips before re interpolation starts Remarks With the GEOLON MLS MTS or MTS M either a c value or a s value or both must be given or the command will abort indicating an error With the GEOLON MES and MCS normally no parameters should be given since by design they do not show time slips and you are likely to run into buffer memory problems when setting par
8. Measurement Sequence 8 ExpNumber X TEXTNFOParamters IL HU EXTERNAL Interval Definitions LI D i FOR JhmtewalDefintions FOMA ee eee enDOmew B EU Configuring the A D Converter GEOFRONE confiture tne A D Converter RW GPS TimeandStoageServices IL PO GPSSKEW Cs Time and Storage Services HU HYDROPHONE Configuring the A D Converter HI INTERVAL Interval Definitions LOG Information Commands MIN Interval Definitions 19 MS Configuring the A D Converter WJ TEXTINFO SS TEXTINFO Parameters lt Questionmark gt Listing of all commands LI 6 SEND GmbH MESO4Ag mnl 15 of 31 Marine Exploration Seismocorder GEOLON M ES Command Group RATE Configuring the A D Converter err ira E dE RELEASE JTieSevies o 1 1 pl SEC si Interval Definitions DI SETTINGS or ST Information Commands HI EE EE Et rom Power Management START oetniims of Measurement Sequence PL StatComment jTEXTINFOParamtes TI DI StatiNam TEXTNFOParametrs LI HU StatNumber jTEXTINFOParamtes HU STOP jDefiniion of a Measurement Sequence HI SYNCHRONISE me Services 1 O 6 1 Help Each command is accompanied by a short help text line which briefly shows the input parameters To display the help text the command must be preceded by a qu
9. SENDCOM and RS232 interface This chapter describes these commands their parameters and their functions Before you can set up a communication GEOLON MES has to be connected to the power supply After the SENDCOM program has been started the recorder automatically boots with the last stored settings If the space key on your keyboard is pressed and held during the booting procedure of GEOLON a dialogue will be displayed that allows to restore the default system settings see chap 7 1 2 The commands may be issued in any order and they are stored in non volatile memory so that the current state will be retained even if power is removed Please be aware that GEOLON will loose time synchronisation after removing power for an extended period longer than 30 seconds Several commands may be entered in the same line separated by spaces Available Commands in Alphabetic Order ALL Configuring the A D Converter EE E ChanName TEXTNFOParamtes IL BI CLOSE JjTimeandStorageServies PO COMMENT Definition of a Measurement Sequence 1 8 CONTINUOUS Interval Definitions 19 DCF77 Uime and Storage Services D0I DCFSKEW Uime Services TR DRIFT Uime and Storage Services IL PH END Definition of a Measurement Sequence 8 ENDLESS Definition of a Measurement Sequence 8 ERRORS Information Commands 16 EVERY interval Definitions EXPERIMENT Definition of a
10. allows to shift all data by a constant time The value has to be in full seconds integer value Use this command for the correction of differences in time if different time standards have been used for synchronising the data logger and for synchronising the airgun controller on the shooting vessel Example Your GPS receiver delivers the time in UTC the shooting vessel provides the shot time as GPS time The difference between these two time standards 1s 14 seconds and therefore you must enter timeshift 14 log filename This option generates a log file of the current mtsread run in the current directory Without using this option the log file will be stored in a file with the name mtsread log no log No log file will be generated nc If this option is used no messages will be produced when mtsread is executed SEND GmbH send2x v261 mnl doc 11 07 2006 15 of 33 Manual SEND2X version 2 61 report slips This option starts a reporting of time slip messages on the screen during the conversion of the data For a description of time slips please see the chap Time Slips in the MTS Manual 1 1 10 smtsread This programs converts data sequences that have been requested from a MTS M tsunameter seismocorder in an ocean bottom unit OBU by the buoy computer s OBUD program It works similar to mtsread just without mls sys file information which is replaced by the header information in th
11. an example of combining the different programs Each of the programs can be used separately Concerning GEOLON MES the library includes following programs mescopy meslog mesread binwrite wavewrite segywrite All programs using as input device the standard input partly as output device the standard output This allows an easy combination of the different programs through piping A detailed description of SEND2X can be found in the Appendix 5 3 Files The nomenclature of the automatically generated files will be described hereafter 5 3 1 Log File All control status and identification information of the current experiment are stored on GEOLON s harddisk Furthermore the log data includes the parameter settings such as the sample rate and the amplifier gain for each channel Normally the program meslog displays these data on the screen Through the assignment of the standard output to the harddisk on the connected external PC these data can alternatively be stored in a text file The user has to define the filename and the destination directory in the form of log file name txt An example of a log file is shown in chapter 7 5 5 3 2 Engineering data The internal temperature and humidity as well as the battery voltage will be stored together with the recorded seismic data on the internal disk The program mesread provides the extraction of the engineering data out of the recorded data stream As for the log file the destinati
12. copied lsb converts the data in 2byte two s complement integer format whereas only the least significant 16 bits will be copied trace cut value in seconds If no shot file 1s available and the raw data should be cut into traces to display the data as seismic section then the option trace cut can be used Thereby the long raw data stream will be cut into traces of equal length given by the entered number of seconds The value has to be in full seconds integer value The option trace cut can not be used in combination with reftek or shot skew lt skew in us If you enter skew 0 the program will apply no skew correction and ignores the skew value written in the raw data file If you don t use this option the skew value written in the raw data will automatically be used to correct the start time of each trace Example skew 1000 Instead of processing the skew value supplied with the raw data the skew correction will now be performed using a skew value of 1 ms Please note that with the reftek option the skew is treated the same way as when using traces no matter whether the skew is entered manually oder taken SEND GmbH send2x v261 mnl doc 11 07 2006 19 of 33 Manual SEND2X version 2 61 from the raw data automatically The proportional skew per second is calculated and used to determine the start sample for the output file 9Cx nteger value Please enter the x coord
13. difficulties with one of the latter types of interfaces please get in touch with SEND For example there are some reports that the PCMCIA FireWire Card of ATEN cannot set up a proper link to the MES If your computer only has a FireWire interface without power supply e g with a 4 pin plug then you have to connect the MES to an external power supply In addition the MES needs a DTR signal at his RS232 connector Otherwise it will not wake up Connecting a second computer via RS232 to the MES and starting SENDCOM under WINDOWS can provide this signal Another possibility is connecting your LINUX PC to the MES via RS232 and starting the LINUX version of SEND GmbH MESO4Ag mnl 25 of 31 Marine Exploration Seismocorder GEOLON MES SENDCOM or a terminal program like MINICOM which also communicates with the MES via the serial interface The latter is recommended since copying the data from the MES to a PC requires utilization of a LINUX PC anyway the filesystem of the MES harddrive cannot be read with a WINDWOS PC Please also note that under LINUX you may have to work with root privileges to perform this type of hardware related tasks Section 7 4 gives a short overview over data retrieval and conversion as described in detail in the accompanying SEND2X manual 7 4 Analysis of Recorded Data After recording the stored data can be read using an external PC with an IEEE 1394 FireWire interface and the SEND2X software suite for the LINUX o
14. do this the standard input has to be assigned to the Firewire device connecting the MCS to the PC Alternatively the standard input can be assigned to the data file which was stored by mcscopy on the harddisk of your computer The converted data will be transferred to the standard output Again the standard output can be assigned to a destination file For example mcsread raw data file gt gt directory file name s2x SEND GmbH send2x v261 mnl doc 11 07 2006 6 of 33 Manual SEND2X version 2 61 Because the decompression and conversion of the raw data needs more processing time than the simple copy procedure we recommend to use mcscopy at first and then to use mcsread as the next processing step mcsread includes the following options values in lt gt are variables which must be entered begin sec integer in GPS seconds or begin date lt formatted_time_string_yyyy mm dd_hh mm ss gt together with end sec integer in GPS seconds or end date lt formatted_time_string_yyyy mm dd_hh mm ss gt Using these options restricts the data conversion to the time window of interest The resulting file will contain only data within this time window We recommend to use the time of the first and the last shot of a survey line GPS seconds means the number of seconds since GPS start on January 6 1980 00 00 o clock Examples begin sec 708669934 end sec 708685565 or begin_date 2
15. has been deactivated The LED will remain off until DTR is set or any key will be pressed If a start time has been defined GEOLON will go into sleep mode as soon as the DTR signal of the RS232 interface 1s deactivated This dramatically reduces power consumption only powering the internal oscillator maintaining time synchronisation until the start time has been reached END finishes a recording sequence All data buffers are saved on the storage cards and GEOLON returns to command mode The green LED lights permanently again Now power may be removed without loss of data As an interactive command it can t be compiled into user commands and will be ignored in that context COMMENT lt string gt defines lt String gt as a comment It may be up to 40 characters long lt String gt is delimited by either a or r EXPComment generates the same result EXPERIMENT string defines string as experiment name It may be up to 24 characters long string is delimited by either a or lt r gt EXPname generates the same result SEND GmbH MESO4g mnl 18 of 31 Marine Exploration Seismocorder GEOLON MES 6 5 Interval Definitions During a recording sequence data may be recorded only part of the time at recurring intervals In an interval pause when no data is being recorded GEOLON remains to be fully operational and does not go into sleep mode EVERY n1 SEC 4n22 MIN sets the duration of a measurement period FOR n1
16. holds the minute as two digit number with leading zero SS holds the seconds as two digit number with leading zero SSSSSS holds the microseconds as six digit number Please note that all GPS time formats have a common requirement The microseconds must consist of figures with 6 numbers after the decimal point The program expects pure GPS time which is counted in seconds after 6 J anuary 1980 00 00 o clock start of GPS by USA Often UTC is used instead of the GPS time UTC time is currently in 2006 14 seconds behind GPS Time that means GPS time UTC 14 seconds When you use UTC time for the synchronisation of the recorder and the GPS of the gun boat delivers GPS time then 14 sec have to be added to your recorder time see option timeshift to get a comparable time basis X COORDINATE The corresponding fields optionally contain the x coordinate of the shot position Y COORDINATE The corresponding fields optionally contain the x coordinate of the shot position Following the SEG Y standard the x and y coordinates have to be in seconds of arc if spherical coordinates are used Then the x value should represent longitude and the y value latitude A positive value designates the number of seconds east of Greenwich Meridian or north of the equator and a negative value designates the number of seconds south or west Seg ywrite automatically recognises if your shot file contains only 3 columns instead of 5 if no coordinates are
17. least significant bits of samples to target file only write the 16 most significant bits of samples to target file write data from all channels into a single target file verbose mode with additional information for debugging print version information and exit suppresses all regular message output display this help and exit SEND GmbH send2x_v261 mnl doc 11 07 2006 24 of 33 Manual SEND2X version 2 61 1 1 18 sacwrite The sacwrite module converts data from the send2x format to SAC Seismic Analysis Code data format It reads data from standard input and writes the output into files For each active channel in the raw data a separate SAC file will be written using the standard nomenclature for file names as described in chapter 5 3 3 Optionally a customized file name can be created using the nameform option Target files will be written to the current directory unless a target directory 1s spezified using the dest option Optionally the geographic location of the station may be provided as input parameter Usage Sacwrite options lt infile or sacwrite h V Options dest PATH or d PATH Sets output for target files to given path directory nameform FORM or n FORM Sets file name format according to format string FORM FORM is a string literal which may not contain spaces or whitespace It can take up any ASCII characters and the following placeholder symbols on device serial number doc channel n
18. to a file on your PC For executing mcslog the standard input has to be assigned to the device path and file of the Firewire interface which is connected to the MCS For example mcslog dev sda displays the log file on the screen and mcslog dev sda directory log file name txt copies the log file to the harddisk of your computer 1 1 4 meslog Meslog displays the MES log file on the screen of your PC The log file includes the settings control status and identification information of all experiments which were carried out since the last disc format synchronization To copy the log file to your computer instead of displaying it on the screen the standard output has to be redirected to a file on your PC For executing meslog the standard input has to be assigned to the device path and file of the Firewire interface which is connected to the MES For example meslog dev sda displays the log file on the screen and meslog dev sda directory log file name txt copies the log file to the harddisk of your computer 1 1 5 mcsread This program module reads decompresses and converts the raw data recorded by Geolon MCS into the internal send2x format In addition it generates an ASCII file containing the acquired engineering data for a detailed description see l 3 Files Again the program can read the compressed raw data via standard input through the Firewire interface from the MCS s harddisk To
19. will be recorded in the send2x file timeshift value in seconds The use of this option allows to shift all data by a constant time The value has to be in full seconds integer value Use this command for the correction of differences in time if different time standards have been used for synchronising the data logger and for synchronising the airgun controller on the shooting vessel Example GPS77 delivers the time in UTC the shooting vessel provides the shot time as GPS time The difference between these two time standards 1s 14 seconds and therefore you must enter timeshift 14 log filename This option generates a log file of the current mbsread run in the current directory Without using this option the log file will be written mbsread log no log No log file will be generated nc If this option is used no messages will be produced when mbsread is executed SEND GmbH send2x v261 mnl doc 11 07 2006 11 of 33 Manual SEND2X version 2 61 1 1 8 mlsread Mlsread has to be used to convert raw data acquired by the GEOLON MLS data logger At first the raw data of all PCMCIA cards belonging to one recording session as well the corresponding MLS SYS file must be copied to a directory using e g the cp command Then mlsread is used to decompress and convert the raw data into the internal send2x format Mlsread reads the raw data from either the current directory or from the dir
20. 002 06 21 04 45 34 end 2002 06 21 09 06 05 skew 4 skew time in us This option allows to store a manually entered skew value in the send2x file instead of the skew value from the raw data file Example Cskew 1000 Instead of the skew value of the raw data file a skew value of 1 ms will be recorded in the send2x file timeshift value in seconds The use of this option allows to shift all data by a constant time The value has to be in full seconds integer value Use this command for the correction of differences in time if different time standards have been used for synchronising the data logger and for synchronising the airgun controller on the shooting vessel SEND GmbH send2x v261 mnl doc 11 07 2006 7 of 33 Manual SEND2X version 2 61 Example GPS RTS delivers the time in UTC the shooting vessel provides the shot time as GPS time The difference between these two time standards is 14 seconds and therefore you have to enter timeshift 14 no eng The engineering data will be stored automatically in a file in the current working directory with a filename according to chapter The option no eng suppresses the automatic file generation log filename This option generates a log file of the current mcsread run in the current working directory Without using the option the log file will be written automatically to the file mcsread log no log No log
21. 565 or begin date 2002 06 21 04 45 34 end 2002 06 21 09 06 05 skew lt _ skew in us SEND GmbH send2x v261 mnl doc 11 07 2006 12 of 33 Manual SEND2X version 2 61 This option allows to store a manually entered skew value in the send2x file instead of the skew value from the raw data file s Example Cskew 1000 Instead of the skew value of the raw data file a skew value of 1 ms will be recorded in the send2x file timeshift value in seconds The use of this option allows to shift all data by a constant time The value has to be in full seconds integer value Use this command for the correction of differences in time if different time standards have been used for synchronising the data logger and for synchronising the airgun controller on the shooting vessel Example GPS77 delivers the time in UTC the shooting vessel provides the shot time as GPS time The difference between these two time standards 1s 14 seconds and therefore you must enter timeshift 14 log filename This option generates a log file of the current mlsread run in the current directory Without using this option the log file will be saved as mlsread log no log No log file will be generated nc If this option 1s used no messages will be produced when mlsread 1s executed SEND GmbH send2x v261 mnl doc 11 07 2006 13 of 33 Manual SEND2X version 2 61 1 1 9 mtsread Mt
22. BEND GmbH SEOLON MES 34 D41107 FW ver 1 09 19 09 2006 dci sem cn BOO Message cold I7 09 100 amp I11 U0T7128 ypa gps press CTRL C t break Wait for valid Gres Synchronization cet GES Time Time synchronization wuccesefal 27 09 2006 11 07 41 ok LS hydrophone gain Le hydrophsne gain ck a S j l geophone gain yim Geen ei tei i geophone gain oak SW fete SUN Fate ek experiment munda trench Experiment Comments amp kperiment Funda trench oh coment fault line 42 comment fault line 42 ok iG 11 DR L 23 AI start IO 11 Op L ZE A atart ok Time OF il 056 12 42 23 stop rogramming DS LI Os LI 4l i stop ok rec Record Command ie we Dates amp nat 27 09 2005 Lilo ZNiUATIUT Recorder Response Zrnchronised 27 09 2D08 11 07 42 ADC Gf Hyde H sk ep Query At QC geoph Irsk Fok Tigi Change Ls alli 5DD Hs I4 bits cain 1 l 26 16 Eng Pata Temp 26 C Hygr GZ8 Wet 12 1 VY Capmriky THOS Mbyte total H kbyte recorded data Pec status recording Star 1D 11 24006 1211213 4 Stop 09 12 2006 12 42 23 interval conptinusus Pe le aoe net active Espar iman Bumndia trench zimmer put fault line 42 ok SEND GmbH MES04g mnl 28 of 31 Marine Exploration Seismocorder GEOLON MES Example of a mes log file 9 02 2000 DOSS Ee zo Synctime O secs 29242000 DOT OU 29 02 2000 QUISISZ3 Format successful total 18 Mb 202 20 OOS Lee settings Dace amp Unit 90242000 004251229 Synchro
23. END2X 5 1 SENDCOM This program is used to communicate with GEOLON MES via the RS232 interface e g for automatic booting of MES interactive configuration using the commands as described in chapter 6 and for display of recorded data on the PC monitor by using the SHOW command SENDCOM is a JAVA program which runs on both WINDOWS and LINUX operating systems For installation of the JAVA utilities required please carefully read the installation instructions on the CD R After starting SENDCOM a window like the following appears E Fendlom terg 2 0 f all d x Hie Vue Help COM mu G IE OR RR COM FE Of wer 1 03 22 07 2004 ic SEHD GmbH SE0LON MES Set Frrrre FW wee 1 03 22 07 2004 c SEND GbE bea uns ynehe ani zed As default SENDCOM uses COM 1 as communication port If you want to connect to COM 2 you have to click on the com2 button in the connect port option In the first part of window under the menu bar you can enter commands manually Messages from the operating system of the MES will also be displayed here The second part of the windows displays messages by SENDCOM e g about switches between com ports SEND GmbH MESO4Ag mnl 10 of 31 Marine Exploration Seismocorder GEOLON MES The lowest part of the window displays status information of the connected recorder e g about the current memory stack depth or the loaded firmware file The display areas for system messages and status informatio
24. END2X manual for details of the procedure SEND GmbH MES04 g mnl 22 of 31 Marine Exploration Seismocorder GEOLON MES 7 Description of a Typical Operation Session 7 1 Interactive Operation via External PC 7 1 1 Software Preparation Install the software from the disk delivered with GEOLON MES on your PC The different programs are described in chap 5 For communication with the PC please use SENDCOM It can be used for interactive configuration of GEOLON and for defining measurement sequences The program library SEND2X is used for conversion of recorded data into binary audio wave or SEG Y files 7 1 2 Hardware Preparation Connect GEOLON to the PC you want to use for interactive operation via the RS232 interface by means of a 9 pin modem extension cable Connect GEOLON to the external power supply specified in chap 3 1 The GEOLON MES does not start until a DTR signal is sent by a terminal program to the RS232 interface Therefore the SENDCOM program has to be started before the recorder will boot automatically with the last stored settings However if you got trouble with the last settings and would like to reset the system keep the space key on your keyboard pressed while the GEOLON MES is booting A dialogue will be displayed that allows to restore the default system settings Connect the auxiliary signals necessary for your measurement project to the interface described in chap 3 4 Connect at least the input for time s
25. Fa T d wr Et ii ET Ls E i Data handling and conversion suite for Geolon Recorders SEND Signal Elektronik GmbH Version 2 61 Rostocker Str 20 D 20099 Hamburg e mail office send de Tel 49 40 375008 03 Fax 49 40 375008 93 SEND GmbH send2x_v261 mnl doc 11 07 2006 1 of 33 Manual SEND2X version 2 61 This program package converts the compressed recordings of the SEND data loggers into different formats SEND2X version 2 60 is available for the Linux operating system This version allows the conversion of raw data into a binary file an audio wave file a special Reftek SEG Y format for seismological data and into the standard SEG Y format if an appropriate shot file is available Combining the programs Structure of the shot file SEND GmbH send2x_v261 mnl doc 11 07 2006 2 of 33 Manual SEND2X version 2 61 This manual includes the description of utilities which are required to save and process the data of SEND s data loggers Methusalem MBS Geolon MCS Geolon MES Geolon MLS and Geolon MTS On the delivered CD R you will find a program library and a script which includes an example of combining the different programs Each of the programs can be used separately The library consists of the device specific files for the Geolon MCS mcscopy mcslog mcsread and mcsupload for the Geolon MES mescopy meslog and mesread for the Geolon MLS mlsread for the Geolon MTS MTS M mtsread smt
26. MES 2 Functional Description 2 1 General GEOLON MES is a seismic exploration data logger optimised for the marine environment 3 30 Volt di Power Management Guard Hyd 24 hit 2d i PES e Digitiser e 4 MB 20 30 GB IEEE 1384 EL Fi r Buiter ATA Disk Interface mewe 2 Y Y e Engineering Command DICXO Time Base Z signals Interpreter Synchronization AIHT AIH2 AIBH3 R5232 Block Diagram One Hydrophone one 3 component geophone or all 4 components may be recorded using differential input signals The pre amplification is software selectable in seven 6 dB steps from 0 dB 36 dB Then each channel is digitised using a high performance 24 bit sigma delta A D converter that produces software selectable sample rates needed for seismic exploration A high performance digitally temperature compensated crystal oscillator DTCXO produces timing signals that are synchronised before deployment using GPS time signals The time information together with the sampled data is temporarily stored in a 4 MB buffer In addition internal temperature humidity battery voltage as well as 3 external engineering signals are recorded every minute Whenever the buffer is full a 20 30 GB hard disk is powered up and the buffer is transferred to the disk e Configuration and parameterisation of GEOLON MES may be carried out interactively via a PC using the communication program SENDCOM EXE Configuration data is stored in non volat
27. S N gt SEND Signal Elektronik GmbH GEOLON M ES Marine Exploration Seismocorder User Manual Marine Exploration Seismocorder GEOLON MES Table of contents User Manual Document No MES04g mnl doc June 2006 Manufactured by S N N gt SEND Signal Elektronik GmbH Rostocker Str 20 Phone 49 40 375008 03 URL http www send de 20099 Hamburg Germany Fax 49 40 375008 93 e mail office send de SEND GmbH MESO4Ag mnl 1 of 31 Marine Exploration Seismocorder GEOLON MES 1 Technical Data Number of inputs 4 differential input channels 3 geophone inputs and high impedance hydrophone input software selectable from 5 Non to 80 mV in seven steps Sample rate 125 250 500 1000 2000 Sps 8 ms 4 ms 2 ms 1 ms 0 5 ms 0 03 ppm 5 440 C Storage medium 30 GByte hard disk Storage interface IEEE 1394 Firewire transfer rate 5 GB in 10 min Engineering signals Temperature Humidity Battery voltage 3 additional analog inputs 0 2 5 V 12 bits resolution sampled every minute Power supply 10 30 Volt Power consumption 200 uA shutdown 0 26W standby recording channel 1 W recording 3 channels 1 3 W recording 4 channels 1 5 W Top View E E 7 i a Z Se cC LLJ CH 1 e Le 112 0mm E e E kb wmd LLL P D Bottom View 4 i fy GB Side View SEND GmbH MES04 mnl 2 of 31 Marine Exploration Seismocorder GEOLON
28. S04 g mnl 7 of 31 Marine Exploration Seismocorder GEOLON MES 3 5 Analog Inputs The GEOLON MES has four differential input channels for 4C recordings Channel 1 has a very high impedance of 30 MOhm as well as a guard output to directly connect to a hydrophone Channels 2 4 have an input impedance of 200 kOhm for connecting to geophones Either the hydrophone channel or the geophone channels alone or all four channels may be activated using the CHANNEL command The preamplifier gain for each channel may be set using the GAIN command The minimum amplification factor is and the maximum is 64 in 7 discrete steps of 6 dB each The input sensitivity UINougg can be determined using the following formula UINoas 5 V GAIN K differential and lx GAIN lt 64 in seven steps 3 6 3 Component Geophones D SUB 25 sockets Here the case of GEOLON MES is connected to analog ground analog ground GEO Z __ differential input of the Z component 100 kOhm to AGND 4 GEO X differential input of the X component 100 kOhm to AGND GEO Y ___ differential input of the Y component 100 kOhm to AGND AUXI auxiliary logic input or output under software control M AUX3 auxiliary logic input or output under software control 10 20 eround return for AUXn logic in and outputs 25 5 V sensor power supply AUX2 auxiliary logic input or output under soliware control AUX4 AIN3 auxiliary logic input or output analog input 3
29. ameters RESAMPLE can react to three special situations l Data gaps In this case RESAMPLE will handle the data before and after the gap as separate streams of data 2 If the time between two time slips 1s larger than the time covered by the data in the internal buffer of RESAMPLE an error message will be displayed In this case the s parameter can SEND GmbH send2x v261 mnl doc 11 07 2006 27 of 33 Manual SEND2X version 2 61 be used to increase the buffer size accordingly Please note that there is one buffer for each channel of data so the value for this parameter is limited by the total amount of real and virtual memory of the computer divided by the number of channels recorded It also means that for large files with great distances between timeslips the memory requirement can exceed the limits of any state of the art PC In this case we suggest splitting the input file and trying to correct smaller snippets which can later be reassembled by concatenation 3 Frequent discrepancies If time slips occur in rapid succession typically with alternating signs 1 sample 1 sample etc the number of samples between slips is insufficient for proper interpolation In this case the s parameter be set to a threshold in seconds that has to pass without a new time slip before a new interpolation is done 1 1 20 pressure2ascii This programs converts sequences of pressure data that have been retrieved from a MTS M tsuname
30. apter 5 3 3 thus 1s on c q v Y J h m s gse split SEC or t SEC split the output files into segments of lt SEC gt seconds worth of p p 8 samples each SEND GmbH send2x_v261 mnl doc 11 07 2006 21 of 33 Manual slice SIZE or c SIZE verbose or v version or V Ssilent or s help or h SEND2X version 2 61 slice the output files into segments of SIZE megabytes size each verbose mode with additional information for debugging print version information and exit suppresses all regular message output display this help and exit SEND GmbH send2x v261 mnl doc 11 07 2006 22 of 33 Manual SEND2X version 2 61 1 1 17 paswrite The paswrite module converts data from the send2x format to PASSCAL data format It reads data from standard input and writes the output into files For each active channel in the raw data a separate PASSCAL file will be written using the standard nomenclature for file names as described in chapter 5 3 3 Optionally a customized file name can be created using the nameform option Target files will be written to the current directory unless a target directory is spezified using the dest option Finally a multiplexed target file containing interleaved data from all channels can be written using the multiplexed option By default the 16 most significant bits from each sample will be written to the target file unless the Isb option is used to switch to the 16 least s
31. available The columns have to be separated by empty spaces or tabs Seg ywrite writes four SEG Y files each containing the data of one channel If you have no shot file please use the program option wavewrite The resulting way file can be displayed using a sound display program as for example COOLEDIT SEND GmbH send2x v261 mnl doc 11 07 2006 3 of 33 Manual SEND2X version 2 61 1 3 Files The nomenclature of the automatically generated files will be described hereafter 1 3 1 Log File of Geolon MES and Geolon MCS All control status and identification information of the current experiment are stored on GEOLON s harddisk Furthermore the log data includes the parameter settings such as the sample rate and the amplifier gain for each channel Normally the program meslog displays these data on the screen Through the assignment of the standard output to the harddisk on the connected external PC these data can alternatively be stored in a text file The user has to define the filename and the destination directory in the kind of log file_ name txt 1 3 2 Engineering data The internal temperature and humidity as well as the battery voltage will be stored together with the recorded seismic data on the internal disk The programs mesread and mcsread provide the extraction of the engineering data out of the recorded data stream The file will automatically be written in the current working directory The corresponding file name is d
32. d twice The first time in the pipe combining mesread with seg ywrite and the second time combining mesread with wavewrite 1 23 Structure of the shot file Normally the program uses a shot file for converting the raw data file in a file of single traces The shot file has to contain the name of shooting line or profile the shot point number and shot time at minimum Also the entry of the geographical coordinates of the shot points are possible Together with the coordinates for the receiver provided by the options gcx and gcy of seg ywrite the complete geographical positioning information of shot and receiver can be stored in the resulting SEG Y file Shotfiles generally consist of a header line containing field descriptions and parameter options followed by lines of data and terminated by a blank line containing a single carriage return Seg ywrite can read following shot file formats 1 GPS time in seconds microseconds LINENAME SHOTPOINT GPS TIME SEC abcd 1234 1234 1234567 123456 abcd 1237 1237 1234597 123456 abcd 1314 1314 1234607 123456 SEND GmbH send2x_v261 mnl doc 11 07 2006 29 of 33 Manual SEND2X version 2 61 2 GPS time in seconds microseconds coordinates of shotpoint LINENAME SHOTPOINT GPS TIME SEC X COORDINATE Y COORDINATE abcd 1234 1234 1234567 123456 374136 6456332 abcd 1237 1237 1234597 123456 374136 6456332 abcd 1314 1314 1234607 123456 374136 6456332 3 GPS time in year month day_hour min
33. e data sequence file Data in and output can be pipes or files only with no additional parameters EXAMPLE smtsread data inputfilename gt data outputfilename 1 1 11 mcsupload This program allows uploading of user programs to the Geolon MCS via the IEEE1394 interface The order of options is not important Options are usp filename This option defines the filename of the user program if StdIn is not used log filename This option defines the name of the logfile If this option is not given mcsupload log will be used by default EXAMPLES mcsupload data user mcs gt dev mcsdevice mcsupload usp data user mcs dev mcsdevice mcsupload p var log mcs mcsupload log usp data user mcs gt dev mcsdevice SEND GmbH send2x v261 mnl doc 11 07 2006 16 of 33 Manual SEND2X version 2 61 1 1 12 mesupload This program allows uploading of user programs new operating system software and new firmware versions to the Geolon MES via the IEEE1394 interface Options are usp filename This option defines the filename of the user program if StdIn is not used rom filename This option defines the filename of the operating system software to be loaded fw filename This option defines the filename of the firmware to be loaded EXAMPLES mesupload data user mes gt dev mesdevice mesupload usp data user mes gt dev mesdevice mesupload fw data mes113a fw mes gt dev mesdevice
34. ectory specified by the src option The converted data will be transferred to the standard output which usually will be re directed to a destination file For example mlsread src directory gt lt directory file s2x gt mlsread includes the following options values in lt gt are required variables src directory specifies the directory which is used as raw data input src may be omitted if the input comes from the current directory The directory must contain all raw data files which may have been copied from multiple PCMCIA cards belonging to one recording session as well as the MLS SYS file from one of the PCMCIA cards help or h displays a list of all options with brief explanations begin_sec integer in GPS seconds Or begin date formatted string yyyy mm dd hh mm ss end sec integer in GPS seconds Or end date formatted string yvyy mm dd hh mm ss Using these options restricts the data conversion to the time window of interest The resulting file will contain only data within this time window We recommend to use the time of the first and the last shot of a survey line Mlsread internally subtracts 60 seconds from begin time and adds 60 seconds to end time the time window thus becomes begin 60secs till end 60secs GPS seconds means the number of seconds since GPS start on January 6 1980 00 00 o clock Example begin sec 708669934 end sec 708685
35. ed shot lt path directory filename gt Please enter the directory and filename where the shot file is located tracelen number of samples The option tracelen allows to cut all traces to a common length Example tracelen 2000 will write traces consisting of 2000 samples SEND GmbH send2x v261 mnl doc 11 07 2006 18 of 33 Manual SEND2X version 2 61 The resulting trace length in seconds can be calculated by trace length in ms number of samples sample period in ms e g 2000 4ms 8000 ms trace length fill null If the entered trace length in option tracelen is longer than the time period between two shots the option fill_null can be used to fill the traces with zeros Q up to the defined trace length Following the SEG Y standard the trace length can not exceed 32767 samples reftek This option stores the complete data 1n one single trace As this file can be longer than 32767 samples it is not written in standard SEG Y Instead of this the file is compatible to the file format provided by the program REF2SEGY of REFTEK Especially the trace headers are modified The option reftek can not be used in combination with shot Please note that only the start time of the first sample of the one single trace will be corrected by the automatic skew correction msb converts the data in 2byte two s complement integer format whereas only the most significant 16 bits will be
36. ed if the input comes from the current directory The directory must contain all raw data files which may have been copied from multiple PCMCIA cards belonging to one recording session as well as the MBS SYS file from one of the PCMCIA cards help displays a list of all options with brief explanations begin sec integer in GPS seconds or begin date lt formatted_string_yyyy mm dd_hh mm ss gt end sec integer in GPS seconds Or end date formatted string yyvyy mm dd hh mm ss Using these options restricts the data conversion to the time window of interest The resulting file will contain only data within this time window We recommend to use the time of the first and the last shot of a survey line Mbsread internally subtracts 60 seconds from begin time and adds 60 seconds to end time the time window thus becomes begin 60secs till end 60secs GPS seconds means the number of seconds since GPS start on January 6 1980 00 00 o clock Example begin sec 708669934 end sec 708685565 Or begin date 2002 06 21 04 45 34 end 2002 06 21 09 06 05 skew 4 skew in us SEND GmbH send2x v261 mnl doc 11 07 2006 10 of 33 Manual SEND2X version 2 61 This option allows to store a manually entered skew value in the send2x file instead of the skew value from the raw data file s Example Cskew 1000 Instead of the skew value of the raw data file a skew value of 1 ms
37. er carrying out the DCF77 or before using the SKEW command the Drift command can be used to check the deviation in milliseconds of the internal oscillator and circuitry from the external DCF77 time pulse The displayed deviation value will not be stored DCFSKEW determines the deviation in milliseconds of the internal oscillator and clock circuitry compared to an external signal on the DCF 7 or DCF77 input pins The skew value will be stored in the log file on the harddisk See also chap 5 3 1 and the appendix GPSSKEW determines the deviation in milliseconds of the internal oscillator and clock circuitry compared to an external signal on the GPS input pins The skew value will be stored in the log file on the harddisk If the skew grows beyond a certain limit the procedure asks whether an automatic calibration of the clock should be carried out or not jay month hour minute second RELEASE sets the time for the release pulse When the RELEASE time has been reached a logic TTL signal active high will be generated at pin 8 of the auxiliary socket 6 8 Definition of TEXTINFO Parameters A number of descriptive character strings can be set which will be stored in non volatile memory These strings are stored in every recording sequence and copied or read together with the data file TEXTINFO lists all entries in the following TEXTINFO parameter fields The nomenclature for the entries are defined according to the PASSCAL file standa
38. es the beginning and the end of a recording sequence The parameters day lt month gt etc are entered as two digit decimal numbers e g 1 01 etc separated by blanks before START or STOP ENDLESS erases the START and STOP time settings Thereafter recording can be controlled using the commands REC and END REC puts GEOLON into recording mode using the parameters which have been entered previously and which may be displayed using the SETTINGS command A new recording sequence is started with its unique initialisation block containing all TEX TINFO description strings as well as the time of synchronisation If START and STOP times have been defined actual data recording will be delayed until the start time has elapsed It will continue until the stop time has been reached If no start time has been defined recording will start immediately When no stop time has been defined recording will continue until either 1 the END command is issued 2 the harddisk is full 3 the batteries are empty If REC has been issued the LED will start to blink While GEOLON is in standby mode not recording data because the start time has not been reached or because it is in an inactive interval period the LED blinks three times in four seconds While data are recorded the LED blinks twice each second The LED will be switched off automatically after 15 minutes when no key has been pressed within this period and DTR signal of the RS232 interface
39. escribed in chapter 1 3 3 The engineering data file looks like sampling time Temperature C Battery Voltage mV HH MM SS DD MM YYYY Humidity KK xX c KVKKKKKK AkKK KKK Ek KK KK KK KKK time temp hydr ubat emu gall ain2 ain3 Upsldr49 DI DS 2003 a 49 1305623 D 5249 JT 0m5m 2003 zy 49 T3059 WXCXCUKCAKCKCOK CK EC RR RR RR CK CK Ko ck ck koc KKK KKK Wok kc ck WO CK CK Kock Kock ck ck c WX CK Kk X Kock kck KEKE KK Se Input 1 3 free channels for user defined input For the GEOLON MTS and MTS M variants the engineering data files contain the pressure values recorded for the corresponding pressure sensor 1 3 3 Data Files The programs binwrite wavewrite and seg ywrite generate automatically files with names of following nomenclature 020806 01 00 01 2002 168 07 09 57 extension bin for binary files Wav for audio wave files segy for files in SEG Y format eng for engineering data of MES and MCS recorder pressure for pressure data of MTS and MTS M recorder t O UN o OQ m K Ben OI GEO ON channel no sequence no event no start time of recording at activation of REC command The start time of recording consists of the year 2002 SEND GmbH send2x_v261 mnl doc 11 07 2006 32 of 33 Manual SEND2X version 2 61 number of days since the beginning of the year 168 the hour 07 minutes 09 seconds 57 SEND GmbH send2x_v261 mnl doc 11 07 2006 33 of 33
40. estion mark Example values in lt gt are variables which must be entered CHANNELS lt cr gt this command displays on the screen lt HYDROPHONE GEOPHONE ALL gt CHANNELS for explanation please see 6 3 displays a list of all commands 6 2 Information Commands ERRORS If errors happened during recording the according messages will be stored internally The command errors allows to display theses messages on the computer screen every time when SENDCOM is activated Older firmware versions of the MES are displaying these messages only once during the boot process LOG displays the log file a of a completed measurement campaign on the terminal screen For details please see chapter 5 3 1 The space key can be used to stop the listing and start the listing again The following commands display information on the current setting of parameters SEND GmbH MESO4g mnl 16 of 31 Marine Exploration Seismocorder GEOLON MES SETTINGS or its short synonym ST reports the actual setting of most configurable parameters and some additional information about the current status of the MES recorder TEXTINFO reports the setting of the TEXTINFO record descriptive strings The TEXTINFO parameters can be used to store survey parameters e g station number or comments about the survey 6 3 Configuring the A D Converter While GEOLON is in command mode before issuing the REC command following parameters for the A D converter may be se
41. file will be generated 1 1 6 mesread This program module reads decompresses and converts the raw data recorded by Geolon MES into the internal send2x format In addition it generates an ASCII file containing the acquired engineering data for a detailed description see ll 3 Files Again the program can read the compressed raw data via standard input through the Firewire interface from the MES s harddisk To do this the standard input has to be assigned to the Firewire device connecting the MES to the PC Alternatively the standard input can be assigned to the data file which was stored by mescopy on the harddisk of your computer The converted data will be transferred to the standard output Again the standard output can be assigned to a destination file For example mesread raw data file directory file name s2x Because the decompression and conversion of the raw data needs more processing time than the simple copy procedure we recommend to use mescopy at first and then to use mesread as the next processing step mesread includes the following options values in lt gt are variables which must be entered begin sec integer in GPS seconds or begin date lt formatted_time_string_yyyy mm dd_hh mm ss gt together with end sec integer in GPS seconds Or SEND GmbH send2x v261 mnl doc 11 07 2006 8 of 33 Manual SEND2X version 2 61 end date lt formatted_time_string_yy
42. g the synchronisation process one line of information is displayed synchronised time and date sec min hour day month year Time synchronisation as well as the actual recording status will be maintained as long as the power supply for GEOLON is not interrupted for more then 15 seconds After time synchronisation has been finished FORMAT will be executed automatically GPS synchronises the internal oscillator Now a GPS time pulse coded signal must be connected to Pin3 and the NMEA String information to pin 7 and GND at pin 11 of the 15 pin Auxiliary connector During the synchronisation process one line of information is displayed synchronised time and date sec gt min hour day month year Time synchronisation as well as the actual recording status will be maintained as long as the power supply for GEOLON is not interrupted for more then 15 seconds After time synchronisation has been finished FORMAT will be executed automatically FORMAT The internal harddisk of GEOLON will be initialised Former data records will be overwritten FORMAT can only be carried out after the application of DCF77 or SYNCHRONISE SEND GmbH MES04 mnl 20 of 31 Marine Exploration Seismocorder GEOLON MES CLOSE This command closes the disk for recording It is not possible to repeat the REC command after carrying out the CLOSE command CLOSE cannot be carried out during recording DRIFT Aft
43. h should be entered lt gt are also used as symbols for standard in and output as part of the command The option help can be used for all listed programs to display a brief description of the program on the screen 1 1 1 mcscopy This program module copies all recorded data from Geolon MCS s harddisk via standard input and standard output to the harddisk of your computer For the execution of mcscopy the standard input has to be assigned to the device path and file of the Firewire interface which is directly connected to the MCS s harddisk e g dev devicefile Also the standard output has to be assigned to the destination directory and file on your computer We recommend raw as extension for the data file on your harddisk For example mcscopy dev sda working directory data file name raw In the case of a corrupted data file e g due to an unclosed file system crash or reboot of the MCS while recording data mcscopy will not be able to determine the correct size of the data file Therefore mcscopy displays a comment requesting to enter an estimated file size and to restart mcscopy using the option save file size in Mbytes gt The file size can be estimated using the following calculation Hle size in MBytes lt sample rate in Hz 0 33 recording days active channels 50 1 1 2 mescopy This program module copies all recorded data from Geolon MES s harddisk via standard input a
44. he pressure housing or the termination of SENDCOM Therefore the program is looking for the presence of a DTR signal at the RS232 interface If there is no signal the GELON will be powered down The only remaining process is probing for the DTR signal This process consumes very low power of about 0 004 W Therefore the connection to a power supply has to be maintained As soon as the RS232 interface 1s reconnected to a PC and the SENDCOM program is running the GEOLON will wake up again 6 10 Maintenance Due to ongoing development of both the MES recorder s operating system and firmware or in case of a malfunction it may be neccessary to provide the MES with a new operating system and or firmware Both can be transferred to the hard drive of the recorder by firewire using the mesupload program that comes along with the SEND2X software suite As of OS version 1 07 the recorder will no longer load these files automatically to prevent boot loops Instead two new commands have been introduced OS UPDATE This command loads a new operating system from a corresponding file on the internal harddrive into the recorder The MES will reboot automatically after installing the new operating system See the SEND2X manual for details of the procedure FW UPDATE This command loads a new firmware from a corresponding file on the internal harddrive into the recorder The MES will reboot automatically after installing the new operating system See the S
45. iation the data file on the harddisk is closed and the recording parameters and error messages are written to the Log File 7 3 1 Data retrieval via FireWire By establishing the Firewire connection to the GEOLON your PC should be able to provide direct access to GEOLON s harddisk and recognise it as own new device Consequently it is also possible to read and copy the data without a connection to the GEOLON via the RS232 interface when the IEEE interface at your computer provides a power supply only possible with a 6 pin to 6 pin FireWire cable Please note that the FireWire link has the priority over commands which need an access to the harddrive Several commands as synchronise or skew don t work while the FireWire link is established This also applies to the MES boot process Booting up the MES with FireWire connected will only show the ROM messages and then be suspended until the FireWire link has been disconnected Please also be aware that if you send the command format once it s execution will be suppressed only for the period where the FireWire connection is established When you disconnect the FireWire cable the suppressed command will be executed Up to now the operation via FireWire 800 is not tested and a proper data handling cannot be guaranteed Due to the hugh amount of different products the operation via PCMCIA FireWire interface is also not tested for all adapters available in the market If you experience
46. ich is used as raw data input src may be omitted if the input comes from the current directory The directory must contain all raw data files which may have been copied from multiple PCMCIA cards belonging to one recording session as well as the MLS SYS file from one of the PCMCIA cards help displays a list of all options with brief explanations begin sec integer in GPS seconds or begin date lt formatted_string_yyyy mm dd_hh mm ss gt end sec integer in GPS seconds SEND GmbH send2x v261 mnl doc 11 07 2006 14 of 33 Manual SEND2X version 2 61 or end date lt formatted_string_yyyy mm dd_hh mm ss gt Using these options restricts the data conversion to the time window of interest The resulting file will contain only data within this time window We recommend to use the time of the first and the last shot of a survey line GPS seconds means the number of seconds since GPS start on January 6 1980 00 00 o clock Example begin sec 708669934 end sec 708685565 or begin_date 2002 06 21 04 45 34 end 2002 06 21 09 06 05 skew 4 skew in us This option allows to store a manually entered skew value in the send2x file instead of the skew value from the raw data file s Example Cskew 1000 Instead of the skew value of the raw data file a skew value of 1 ms will be recorded in the send2x file timeshift value in seconds The use of this option
47. ignificant bits from each sample Usage paswrite options lt infile or paswrite h V Options dest PATH or d PATH Sets output for target files to given path directory nameform FORM or n FORM Sets file name format according to format string FORM FORM is a string literal which may not contain spaces or whitespace It can take up any ASCII characters and the following placeholder symbols on device serial number c channel number oq record sequence number ov event number oe experiment number E X experiment name Zot station number T station name Y year of the first sample J julian day of the first sample D day of month of the first sample oM month of the first sample h hour of the first sample om minute of the first sample Ps seconds of the first sample SEND GmbH send2x_v261 mnl doc 11 07 2006 23 of 33 Manual split SEC or t SEC Slice SIZE or c SIZE sb or l msb or m multiplexed or x verbose or v version or V silent or s help or h SEND2X version 2 61 og gain value Yor sample rate of recording p sample period in micro seconds of recording The default setting to form filenames according to chapter 5 3 3 thus 1s Yon c q v Y S h m s passcal split the output files into segments of lt SEC gt seconds worth of samples each slice the output files into segments of lt SIZE gt megabytes size each only write the 16
48. ile memory to make GEOLON MES independent from the external PC during data recording The interactive configuration uses the serial RS232 port COM1 or COM2 of the PC communicating at 19 2 kBaud 8N1 SEND GmbH MESO4Ag mnl 3 of 31 Marine Exploration Seismocorder GEOLON M ES After deployment and recovery the recorded seismic data as well as the engineering signals are copied via an IEEE 1394 Firewire interface to a Linux PC see also chapter 7 3 The program library SEND2X can be used to decompress the data and to convert it into a binary audio wave or SEG Y format 2 2 Elements 6 5 4 O 3 9 2 1 1 connector for three component geophone 6 Screws for internal clamp connectors with plugs at the bottom side for 2 connector for hydrophone power supply by single wires 3 fastening optional 7 RS232 connector 4 Auxiliary connector 8 LED 5 IEEE 1394 Firewire connector with 9 Connector for power supply by cable plugged cable SEND GmbH MES04g mnl 4 of 31 Marine Exploration Seismocorder GEOLON MES 3 Hardware Description 3 1 Power Supply Power has to be supplied to GEOLON MES with an input voltage range of 10 30 Volts either via the clamp terminals on the bottom side or via the connector on the top side Power supply via terminals at Power supply via connector at bottom side top side The integrated high efficiency DC DC converter has a low battery detector that triggers as soon as the input voltage falls belo
49. ile txt tracelen 2000 In this example mesread cut out data from the raw data file on GEOLON s harddisk between the GPS time 708669934 seconds and 708685565 seconds and passes them over to seg ywrite via standard output Seg ywrite cuts the data stream into traces of 2000 samples regarding the shot times in the shot time file shotfile txt In the example this file is located in the subdirectory shots of your home directory For each activated channel during recording a file with the extension segy will be stored in the directory segy_data The complete sequence of commands could also be arranged in a script Example 2 mesread begin 708669934 end 708685565 dev devicefile gt temp s2x seg ywrite temp s2x dest segy_data shot shots shotfile txt tracelen 2000 wavewrite temp s2x dest wave_data Here mesread cut out data from the raw data file on GEOLON s harddisk via Firewire connection established through the devicefile between the GPS time 708669934 seconds and 708685565 seconds and writes standard output into the file temp s2x in your home directory In the second line you find the command to start seg ywrite which cuts the data stream into traces of 2000 samples regarding the shot times in the shot time file shotfile txt The third line shows how the same file temp s2x can be used for data conversion into audio wave format If you would use pipes to get the same result mesread would be starte
50. ill be provided by a terminal program like SENDCOM via the RS232 interface Another possibility is to connect pin 4 to a voltage between 3 and 9 Volt using pin 5 for signal ground level 3 4 Auxiliary Signals This 15 pin D SUB connector sockets carries all signals which are needed for synchronisation external triggering etc Different plugs should be prepared to control the required function All logic inputs and outputs are TTL compatible signals output power supply 10 Ohm resistor in series 2 AGND Grund return for single ended analog inputs DCF77 or input for time synchronisation active low kOhm pull up M connected to pin 9 of the RS232 connector NONOUI I ee RECORDING oput high while recording data 6 Mauros osputforsyuchaisingober Geolon ES O 7 TRIGGER or input for external trigger active high 10 kOhm pull down or MM T input of NMEA A string of GPS KEE aaa AINI amus input into a 12 Bit A D converter for engineering signals AIN2 analog input into a 12 Bit A D converter for engineering signals 11 15 DGND Ground return for all logic in and outputs SEND GmbH MES04 mnl 6 of 31 Marine Exploration Seismocorder GEOLON MES 3 4 1 DCF 7 or GPS The time synchronisation input is used to set the time and date using a DCF77 or GPS compatible pulse pattern Both signals synchronise on a high low transition to mark the beginning of a second The GPS recei
51. inate for the geophone group here for the OBS location if available gcy integer value Please enter the y coordinate for the geophone group here for the OBS location if available Following the SEG Y standard the x and y coordinates have to be in seconds of arc if spherical coordinates are used Then the x value should represent longitude and the y value latitude A positive value designates the number of seconds east of Greenwich Meridian or north of the equator and a negative value designates the number of seconds south or west data le This option controls the byte order in the data area of the resulting SEG Y file Without using the option seg ywrite stores the trace header and the data in Big Endian format recommended for PC s By using data le the data will be written in Little Endian format le Both data and header will be written in Little Endian format out int If this option will be used then the data in the SEGY file will be written in 4 byte two s complement integer format Without using the option the data will be written in IEEE floating point format as default log filename This option generates a log file of the current seg ywrite run in the current directory Without using this option the log file will be stored in a file with the name seg ywrite log SEND GmbH send2x v261 mnl doc 11 07 2006 20 of 33 Manual SEND2X version 2 61 1 1 16 gsew
52. n can be switched off by using the View option Sendlom version 2 0 The SHOW command can be used to display the current signals at a selected channel SHOW may be used to check the proper operation of the sensor electronics prior to starting an experiment string SHOW displays data of channel string so string selects the channel to be displayed C ctrl C will terminate the command With the current development stage of SENDCOM SHOW can only be activated by typing in the SHOW command After entering the command following window pops up Ira ran seri Zara ne visilde aff Sample fate TUO sens annii atn Factor X1 Current chanel 2 ul 4 channels Date 20604 5 03 Te 1X 15 06 DU 11 0 23 0 35 D r lire amp S ez A rae 1000 aps eSti 2004 1907 131506 SEND GmbH MESO4Ag mnl 11 of 31 Marine Exploration Seismocorder GEOLON MES On the top menu bar the activated options are marked by darkened buttons In the example displayed above the option LINES is activated LINES connects the data points by a line Other options are DOTS only the data points will be displayed ANTIALIASING smoothes stepped lines which are generated due to insufficient resolution of the screen AC in AC mode any DC offset will be removed NULL LINE although the null line will be displayed as grey line already this option activates a modus in which each second data dot will be set to null and marks the null line
53. nd standard output to the harddisk of your computer For the execution of mescopy the standard input has to be assigned to the device path and file of the Firewire interface which 1s directly connected to the MES s harddisk e g dev devicefile Also the standard output has to be assigned to the destination directory and file on your computer We recommend raw as extension for the data file on your harddisk For example mescopy dev sda working directory data file name raw In the case of a corrupted data file e g due to an unclosed file system crash or reboot of the MES while recording data mescopy will not be able to determine the correct size of the data file Therefore mescopy displays a comment requesting to enter an estimated file size and to restart mescopy using the option save file size in Mbytes gt The file size can be estimated using the following calculation Hle size in MBytes lt sample rate in Hz 0 33 recording days active channels 50 SEND GmbH send2x v261 mnl doc 11 07 2006 5 of 33 Manual SEND2X version 2 61 1 1 3 mcslog Mcslog displays the MCS log file on the screen of your PC The log file includes the settings control status and identification information of all experiments which were carried out since the last disc format synchronization To copy the log file to your computer instead of displaying it on the screen the standard output has to be redirected
54. nised 29 02 2000 00 00 00 ADC OC Ht OK ADC QC X OK ADC QC Y ok ADC QC Zi OK Channels all 1000 Hz 24 bits Gain 1111 Capacity 19077 Mb total 19077 Kb remaining Shalt immediately SAS eng endless Interval Continuous Release not active Program INTERACTIVE Experiment experiment_name Comment experiment_comment Cele DUREQESSU 29 02 2000 Mee SE ENK E E e Start sequence at block 64 Stop sequence at block 80 settings Date amp Unit 29 02 2000 00255357 EFFEFEE synchronised 29 02 2000 00200700 ADC OC X ok ADC OC 21 T OK ADC QC A Ok Channels geophone 500 Hz 24 bits Gain X 111 Capacity 19077 Mb total 19077 Kb remaining DLArt immediately Stop endless Interval continuous Belease not active Program INTERACTIVE Experiment experiment name Comment experiment comment 29 022000 0054200 29 02 2000 UUTOTIId SEND GmbH MES04g mnl Start sequence at block 80 Stop sequence at block 95 20 of 31 Marine Exploration Seismocorder GEOLON M ES 8 Support and Service Should any problem arise with the GEOLON MES or its software please contact us for bug reporting or any other support issue via e mail Support send de phone 49 40 375 008 23 fax 49 40 375 008 93 SEND GmbH MES04 mnl 30 of 31 Marine Exploration Seismocorder GEOLON MES 9 Appendix SEND2X manual SEND GmbH MES04 mnl 31 of 31 Manual SEND2X version 2 61 SEND2X wm AR T I a LET E lies re
55. on directory and the filename for the engineering data has to be defined manually We recommend to use the extension eng SEND GmbH MES04 mnl 13 of 31 Marine Exploration Seismocorder GEOLON MES The engineering data file looks like sampling time Temperature C Battery Voltage mV HH MM SS DD MM YYYY Humidity 9o ck ACkck kCckck kokck ko ck ck ck ko ck k MK kk kk VE kk ck KCk KM F AK X time temp hydr ubat ainl ain2 ain3 06 14 49 07 05 2005 2 49 13623 UGs15249 UT 05 2003 ER 49 13623 WW E rr le er e ere der ere er ker Kock X er Eck XO Ek kCk eae Ek ck er Ok ECKE ae ee ee ee Kk ok ok Ek X oh ee Input 1 3 free channels for user defined information 5 3 3 Data Files The programs binwrite wavewrite and segywrite automatically generate files with names according to the following nomenclature 020806 01 00 01 2002 168 07 09 57 extension bin for binary files wav for audio wave files segy for files in SEG Y format eng for engineering data E gt e e e pl D un of GEOLON channel no sequence no event no start time of recording at activation of REC command The start time of recording consists of the year 2002 number of days since the beginning of the year 168 the hour 07 minutes 09 seconds 57 SEND GmbH MES04 mnl 14 of 31 Marine Exploration Seismocorder GEOLON MES 6 Command Description GEOLON is controlled by commands which are transferred via the program
56. ou have to enter timeshift 14 no eng The engineering data will be stored automatically in a file in the current working directory with a filename according to chapter 1 3 2 The option no eng suppresses the automatic file generation log filename This option generates a log file of the current mesread run in the current working directory Without using the option the log file will be written automatically to the file mesread log no log No log file will be generated SEND GmbH send2x v261 mnl doc 11 07 2006 9 of 33 Manual SEND2X version 2 61 1 1 7 mbsread Mbsread has to be used to convert raw data acquired by the Methusalem MBS data logger At first the raw data of all PCMCIA cards of one recording session as well as one of the MBS SYS files must be copied to a directory using e g the cp command Then mbsread is used to decompress and convert the raw data into the internal send2x format Mbsread reads the raw data from either the current directory or from the directory specified by the src option The converted data will be transferred to the standard output which usually will be re directed to a destination file For example mbsread src directory gt lt directory file s2x gt mbsread includes the following options values in lt gt are required variables src directory specifies the directory which 1s used as raw data input src may be omitt
57. perating system The program meslog of the Send2x library provides a glance at the Log File on the screen of the connected PC Either you use the program mescopy to copy the raw data to your PC as it is or you combine the program mesread with segywrite to convert the raw and compressed data into a standard SEG Y format Regarding these programs please follow the instructions in chap 5 2 and the corresponding appendix As of now all programs of SEND2X are running under the LINUX operating system Users who do not have a LINUX operated computer may request a KNOPPIX CD R from us KNOPPIX allows booting a working LINUX environment directly from CD R SEND GmbH MES04 mnl 26 of 31 Marine Exploration Seismocorder GEOLON MES 7 5 Examples The following experiment is assumed to be due for preparation Configuration A D converter 4 channels gain 16 for each of the 4 channels sample rate 500 Measurement sequence Experiment comment fault line 42 Experiment name sunda trench Start time November 11th 2006 12 h 23 min 42 sec Intervals None Stop time Dezember 9 2006 12h 42min 23 sec Time synchronisation Performing the preparation as described above by issuing the commands with the appropriate parameters will result in the monitor responses shown on the next page SEND GmbH MES04 mnl 27 of 31 Marine Exploration Seismocorder GEOLON MES Sere Cep ea een 4 ell sl eROLON MES SH 041107 OS ver 1 09 0 09 ZDDe Iech
58. pply through batteries should be sufficient for the predicted duration of the measurement campaign otherwise the experiment could be interrupted before completion In addition the measurement sensors have to be connected to the configured analogue input channels Note GEOLON s harddisk will always be repartitioned and reformatted during initialisation on GEOLON to ensure a sound defragmented file system The GEOLON will preserve the configuration file on the harddisk reading it first and storing it again after the harddisk has been initialised Before starting data recording a time synchronisation according to chap 6 7 has to be performed see there the commands DCF77 GPS or SYNCHRONISE This is done by connecting a DCF77 or a GPS receiver with an output for a time pulse signal to the auxiliary connector Be aware that GEOLON may lose its time synchronisation if power is removed for more than 30 sec and in this case no recording will take place The REC command puts GEOLON into recording mode using the parameters defined before respectively the settings of the last recording default values If a START time has been defined chap 6 4 before the GEOLON will now be switched into the stand by modus At START time the recorder will wake up and begins data recording Once the REC command has been entered the RS232 cable can be disconnected The duration of the measurement campaign usually is defined using commands described in chaps
59. quence no and the date and time of recording start In addition each file will be marked by the extension wav Options dest lt path destination directory gt This option defines the directory in which the converted data files will be stored lower Please use this option if you would like to preserve the 16 least significant bits of the 24 bit data Without using this option wavewrite neglects the 8 least significant bits as default 1 1 15 seg ywrite This program module converts the internal send2x format into SEG Y format The program requires a shot file for cutting the long raw data stream into single traces Please find a description of the shot file structure at the end of this chapter If no shot file 1s available a single and long SEG Y trace can be generated using the option reftek As well as the other writing programs seg ywrite reads the data via standard input and writes for each activated channel and for each recording period sequence a file into a destination directory The filenames will be generated automatically and marked by the extension segy Each filename consists of the recorder s serial number channel no sequence no and the date and time of recording start using the nomenclature as described in chapter 5 3 3 Options dest lt path directory gt Please enter the complete path to and the name of the destination directory where the resulting converted files should be stor
60. rd n ExpNumber sets the Experiment Number n may be up to 2 digits long n StatNumber sets the Station Number n may be up to 4 digits long StatName string defines string as Station Name string may be up to 24 characters long and it is delimited by either or a T SEND GmbH MES04 mnl 21 of 31 Marine Exploration Seismocorder GEOLON MES StatComment string defines string as Station Comment string may be up to 40 characters long and it is delimited by either or a lt r gt n ChanName string defines string as Channel Name of the n th channel string may be up to 10 characters long and it is delimited by either or a lt r gt n may be between and 4 n ChanComment string defines string as Channel Comment of the n th channel string may be up to 40 characters long and it is delimited by either or a lt r gt n may be between and 4 6 9 Power Management After connecting MES to the power supply the MES waits for a DTR signal before it will start the boot sequence The DTR signal will be provided by a terminal program like SENDCOM via the RS232 connector SHUTDOWN This command allows switching off the GEOLON in a closed pressure cylinder For this the RS232 interface must be linked to an external connector at the housing SHUTDOWN activates a mode which is waiting for the disconnection of the RS232 connector e g at the PC or at t
61. rite The gsewrite module converts data from the send2x format to GSE Group of Seismic Experts standard file format It reads data from standard input and writes the output into files For each active channel in the raw data a separate GSE file will be written using the standard nomenclature for file names as described in chapter 5 3 3 Optionally a customized file name can be created using the nameform option Target files will be written to the current directory unless a target directory is spezified using the dest option Usage gsewrite options lt rawdata s2x Options dest PATH or d PATH Sets output for target files to given path directory nameform FORM or n FORM Sets file name format according to format string FORM FORM is a string literal which may not contain spaces or whitespace It can take up any ASCII characters and the following placeholder symbols on device serial number c channel number q record sequence number ov event number oe X experiment number E X experiment name Zot station number T station name Y yearof the first sample J julian day of the first sample D day of month of the first sample oM X month of the first sample h hour of the first sample om minute of the first sample Ps seconds of the first sample g gain value Yor sample rate of recording p sample period in micro seconds of recording The default setting to form filenames according to ch
62. sread and pressure2ascii for the Geolon MBS mbsread The device dependent programs can only be used while working with the corresponding device and the data retrieved can then be further processed with the following device independent programs binwrite wavewrite seg ywrite gsewrite paswrite sacwrite resample All programs use the standard input as input device and the standard output as output device most of the time This allows an easy combination of the different programs by pipeing SEND GmbH send2x_v261 mnl doc 11 07 2006 3 of 33 Manual SEND2X version 2 61 Specific Linux issues To allow handling of files larger than 20 Gbytes and more please format the harddisk of your Linux computer with the maximum cluster and sector size Also depending on your Linux distribution it might be necessary to work with root privileges when performing hardware related tasks e g retrieving data from IEEE1394 drives utilized by the MES data recorder Installing the programs The programs can simply be copied from the distribution CD ROM to the harddrive of your Linux system e g to usr send2x bin It is recommended that you append your path variable with the path to the send2x files Example PATH PATH usr send2x bin SEND GmbH send2x v261 mnl doc 11 07 2006 4 of 33 Manual SEND2X version 2 61 1 1 Description of individual programs In the following description the symbols will be used to include variables whic
63. sread has to be used to convert raw data acquired by the GEOLON MTS MTS M data logger At first the raw data of all PCMCIA cards belonging to one recording session as well as the corresponding MLS SYS file must be copied to a directory using e g the cp command Then mtsread is used to decompress and convert the raw seismic data into the internal send2x format The raw data of the absolute pressure gauge will be converted into ASCII format and stored in a separate file The name of this file will be generated automatically with the channel number 5 and the extension pressure see also chap 1 3 3 The resulting ASCII file looks like this de gege de ceokckcdeckckockckckckokokokckokok o kokokokokok OX okokokokokockokoko KKK kokok ok kokok ok okokokok KKK eege zk time pressure mBar lafts0s 1 13 16 06 2005 1089 0 L3532502Z26 16 06 2005 1088 7 13450 425 16 06 2005 1080 6 1232502590 16 00 2005 1088 9 KRRRRRR RRR RRR CK CK WX Xo Kock ook koc KKK KKK KE KKK e Kk Kk KEK de e de ger kr kok KR EK KKK KX Mtsread reads the raw data from either the current directory or from the directory specified by the src option The converted data will be transferred to the standard output which usually will be re directed to a destination file For example mtsread src directory gt lt directory file s2x gt mtsread includes the following options values in lt gt are required variables src directory specifies the directory wh
64. t n CHANNELS determines the channels to be recorded n may be 1 3 or 4 Instead of these numbers descriptive strings can be used HYDROPHONE for 1 GEOPHONE for 3 and ALL for 4 For example 1 CHANNELS or HYDROPHONE CHANNELS 3 CHANNELS or GEOPHONE CHANNELS 4 CHANNELS or ALL CHANNELS n han GAIN sets the gain for the analog preamplifier of chan that can be 1 3 4 HYDROP HONE GEOPHONE or ALL n may be any power of 2 number between and 64 A full scale signal requires an amplitude of 5 Vpp at the A D converter input n MS converts n2 milliseconds to the corresponding frequency This command can be used as a prefix to the RATE command for convenience n RATE determines the sampling rate zm samples per second Valid sample rates are 1000 1 ms 500 2 ms 250 4 ms and 125 8 ms 6 4 Definition of a Measurement Sequence While in command mode the duration of a measurement campaign can be defined Recording of data may begin at a certain start time and last until a certain stop time or it may be controlled by an external trigger signal In addition a recurring interval may be defined consisting of a recording time and a period duration After all these parameters have been set GEOLON is activated using the REC command This puts GEOLON into recording mode jay month year hour minute second START or STOP SEND GmbH MESO4Ag mnl 17 of 31 Marine Exploration Seismocorder GEOLON MES defin
65. ter seismocorder in an ocean bottom unit OBU by the buoy computer s OBUD program It writes the data as ascii text into standard output or into a file with a filename of your choice The input file has to be generated by the OBUD software These data files can be read by pressure2ascii using the file option EXAMPLE pressure2ascii file 765432 10 o0bud 2 data outputtextfile whereas 765432 IOobud is a file stored by the OBUD software on the buoy computer after retrieving pressure data from the OBU whereas data outputtextfile is a path and filename of your choice If you leave this string in your command the ASCII data will be piped into standard output The resulting ASCII file looks like date amp time Of first sanpie 06 02 2006 OTE 63 16 sample time pressure mBar 071088 6 T O200009297 307 1099 1 The start time of the measurement is noted in the first line of the file The second line explains the sorting of the following data The first value in the data lines stands for the seconds gone since the measurement was started 1 2 Combining the programs The concept to use standard input and output allows to hand over the data easily from program to program and to combine the program modules in pipes Example 1 mesread begin 708669934 end 708685565 dev sdc seg ywrite dest segy_data SEND GmbH send2x v261 mnl doc 11 07 2006 28 of 33 Manual SEND2X version 2 61 shot shots shotf
66. umber q record sequence number ov event number oe experiment number E experiment name Zot station number T station name Y yearof the first sample J julian day of the first sample D day of month of the first sample oM X month of the first sample h hour of the first sample om minute of the first sample Ps seconds of the first sample g gain value SEND GmbH send2x_v261 mnl doc 11 07 2006 25 of 33 Manual split SEC or t SEC Slice SIZE or c SIZE latitude lt deg gt or a lt deg gt longitude deg or o deg verbose or v version or V silent or s help or h SEND2X version 2 61 Yor sample rate of recording p sample period in micro seconds of recording The default setting to form filenames according to chapter 5 3 3 thus 1s n c q v Y J h m s sac split the output files into segments of lt SEC gt seconds worth of samples each slice the output files into segments of lt SIZE gt megabytes size each set latitude of station to lt deg gt degrees where lt deg gt is a floating point number with north being a positive value set longitude of station to deg degrees where deg is a floating point number with east being a positive value verbose mode with additional information for debugging print version information and exit suppresses all regular message output display this help and exit SEND GmbH send2x v261 mnl doc 11 07 2006
67. ute second microsecond e g 2003 05 07_06 14 49 123456 LINENAME SHOTPOINT GPS TIME DATE abcd 1234 1234 2003 05 07_06 14 49 123456 abcd 1237 1237 2003 05 07 06 14 50 123456 abcd 1314 1314 2003 05 07 06 14 51 123456 4 GPS time in year month day hour minute second microsecond coordinates of shotpoint LINENAME SHOTPOINT GPS TIME DATE X Y COORDINATE COORDINATE abcd 1234 1234 2003 05 07 06 14 49 123456 374136 6456332 abcd 1237 1237 2003 05 07 06 14 50 123456 374136 6456332 abcd 1314 1314 2003 05 07 06 14 51 123456 374136 6456332 The header line contains the following field discriptors LINENAME The corresponding fields contain descriptive string up to 16 characters long SHOTPOINT The corresponding fields contain an ASCII coded number up to 2147482648 SEND GmbH send2x_v261 mnl doc 11 07 2006 30 of 33 Manual SEND2X version 2 61 GPS TIME The corresponding fields contain ASCII coded time information The colon separated parameter options may be either DATE for a human readable timeformat or SEC for time values in GPS seconds since start of service on January 5 1980 The data format for the SEC option is SECONDS MICROSECONDS The data format for the DATE option is VV MM DD HH MM SS ssssss where YYYY holds the year as a four digit number MM holds the month as a two digit number with leading zero DD holds the day as two digit number with leading zero HH holds the hour as two digit number with leading zero MM
68. ver used has to be configured for sending the NMEA signal with following settings 4800 Baud rate 8N1 modus no follow control sending GPZDA and GPGGA strings 3 4 2 SYNCHRONISED This output is set to a high level as long as time synchronisation is maintained 3 4 3 RECORDING This output is set to high level while data are being recorded It is set to low level during the idle phase of an interval 3 4 4 Master out This is an uncommitted output that may be used for customer specific signals 3 4 5 TRIGGER This input may be used to start and stop recording of data if the trigger has been activated using the EXTERNAL command As long as the input is at a high level data are recorded While the input is at a low level data recording is halted Each time the trigger is activated a new recording sequence is started 3 4 6 RELEASE As soon as the release time is reached this output switches to high level The release time can be set using the RELEASE command 3 4 7 AIN1 AIN2 AIN3 These inputs are sampled every minute by a 12 bit A D converter The input range is from 1 to 1 Volt That means Volt generates a hexadecimal number 800 0 Volt generates a hexadecimal number 000 1 Volt generates a hexadecimal number 7FF While AINI and AIN2 are connected to the 15 pin D SUB connector for auxiliary signals the input of AIN3 is possible via pin 22 at the D SUB 25 socket for geophones please see chap B 6 SEND GmbH ME
69. w 8 Volts Once the low battery detector has triggered the input voltage has to be raised above 10 Volts again to reset it If the low battery status is sensed during data recording recording is terminated immediately and GEOLON MES goes into standby mode All data prior to low battery detection will be safely stored on the internal disk A large storage capacitor buffers the power supply for the oscillator and time base module Therefore GEOLON MES may be disconnected from the power supply for up to 30 seconds before it looses time synchronisation once established 3 2 Power connector The Binder plug at the front of MES has to be connected as follows internal connector connector incl housing S notch SEND GmbH MES04g mnl 5 of 31 Marine Exploration Seismocorder GEOLON MES 3 3 RS232 Interface The GEOLON MES operates as a DCE device so a straight 9 pin modem cable is needed to connect it to a COM interface on the PC The PC always operates as a DTE device thus all signals adhere to the standard RS232 pin out Lm bet always high 45V output from DCE to DTE TxD input from DTE to DCE E Od input from DTE to DCE wake up signal m e bs een 8 CTS Loupe from DCH ont 9 DCF77 synchronisation input connected to pin 3 of the auxiliary connector After connecting MES to the power supply the MES waits for a DTR signal before it can start the boot sequence The DTR signal usually w
70. ynchronisation pin 3 7 1 3 Preparation of a Measurement Campaign For measurement campaign preparation the A D converter has to be configured and the measurement parameters have to be defined Configuration data and parameters of the measurement sequence are stored in non volatile memory Consequently GEOLON will always boot with its last configuration as default settings During measurement campaigns a steady power supply is required However GEOLON will tolerate short power fails of up to 30 seconds without losing its time base and resume recording after the power supply is re established Configuring the A D Converter The A D converter has to be configured concerning the necessities of the experiment see chap 6 3 In particular the number of channels the gain for the analogue preamplifier and the sampling rate have to be defined SEND GmbH MESO4Ag mnl 23 of 31 Marine Exploration Seismocorder GEOLON MES Definition of a measurement sequence The measurement sequence is defined by using suitable commands for operation and setting appropriate parameters For details see chaps 6 4 6 5 6 6 and 6 7 In addition several descriptive parameters of the experiment or survey can be entered via TEXTINFO character strings according to chap 6 8 7 2 Stand Alone Data Acquisition GEOLON is designed for stand alone data recording following a previously defined configuration and parameterisation as described above The power su
71. yy mm dd_hh mm ss gt Using these options restricts the data conversion to the time window of interest The resulting file will contain only data within this time window We recommend to use the time of the first and the last shot of a survey line Mesread internally subtracts 60 seconds from begin time and adds 60 seconds to end time the time window thus becomes begin 60secs till end 60secs GPS seconds means the number of seconds since GPS start on January 6 1980 00 00 o clock Examples begin sec 708669934 end sec 708685565 Or begin date 2002 06 21 04 45 34 end 2002 06 21 09 06 05 skew 4 skew time in us This option allows to store a manually entered skew value in the send2x file instead of the skew value from the raw data file Example Cskew 1000 Instead of the skew value of the raw data file a skew value of 1 ms will be recorded in the send2x file timeshift value in seconds The use of this option allows to shift all data by a constant time The value has to be in full seconds integer value Use this command for the correction of differences in time if different time standards have been used for synchronising the data logger and for synchronising the airgun controller on the shooting vessel Example GPS77 delivers the time in UTC the shooting vessel provides the shot time as GPS time The difference between these two time standards 1s 14 seconds and therefore y

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