GeoSnap Express (Tetracam) User Guide
Contents
1. A detailed description of the LED sequences and their meanings are presented below Field of View 2014 GeoSnap Express TC User Guide T Getting Started Red and Green LED Codes Startup Sequence Red LED Green LED Meaning Flashing slowly Flashing slowly Board is checking for access to the alternating with alternating with Red microSD card and writing a default Green LED LED CONFIG file to the card if a CONFIG file does not already exist Note this is also the LED code for an SD card error see below so if this pattern persists check the SD card Flashing slowly with Flashing slowly with Board is waiting for a serial message from Green LED Red LED the camera indicating the camera is ready to start operating If no signal is received after approximately 30 seconds for the ADC cameras or 2 minutes for the Micro MCA the board moves on to the next step if this occurs check to make sure the baud rate of the camera and the GeoSnap match Flashing slowly The GeoSnap system is ready to start operating If the GeoSnap system is configured for fast as possible or time based triggering the first trigger command will be sent at this point Flashing quickly GPS receiver has a lock If the GeoSnap system is configured for distance based triggering and no altitude limit is set the first trigger command will be sent 10 seconds after lock is obtained Solidly lit with Green Solidly lit with Red This occurs after pressin2. Each time the GeoSnap system is powered it searches for a configuration file named CONFIG TXT on the microSD card This is a configuration file that contains options to customize the operation of the GeoSnap system If this file is not found a new configuration file is created with default options The file consists of human readable ASCII text and can be edited using many types of text editors On Windows either Notepad or Wordpad may be used On OSX TextEdit may be used On GNU Linux or Unix EMACS Vim Nano Pico or other graphical equivalents may be used Note word processing software such as Microsoft Word should not be used to edit the configuration file The first line of the CONFIG file displays which GeoSnap system firmware generated the file The sections below describe in detail the various settings and how their options values affect the behavior of the GeoSnap system The GeoSnap system requires slightly different firmware for ADC Lite Micro Snap cameras and the Micro MCA cameras and a couple options in the configuration file are slightly different to accommodate the specific requirements of the cameras File Edit Format View Help Field_of_view GeoSnap_Express TCA_firmware 2 3 0 FFFFAFHAAAAAAA AAA AAAS AAA AAAS AAA AAA AAA AAA AAA AAA AAA AAA A AAA AAA aE Field of View GeoSnap Express TCA Configuration File FHFHFFFAHAAAAAAAAA AAA AEA AAA AAA AAA A AAA AAA A AERA A EAA AAA A ERE esseeseeeeeeee Camer
3. Since capture verification is ignored when blind logging is enabled if you are in fast as possible mode the GeoSnap will send a trigger command at the interval specified in the Resend_trig_time_ms option option 7 Associate position attitude data with the image x milliseconds after capture verification is received Default String 16 Association delay_ms 0 Description This option allows you to add a delay between when the GeoSnap system received capture verification and when the position attitude association is performed and written to the image log file Field of View 2014 GeoSnap Express TC User Guide 19 GeoSnap System Files Enable disable onboard logging of position attitude data Default String 17 Data_logging 0 Options 0 enable mage log and flight data log default l enable image log only 2 enable flight data log only 3 disable image log and flight data log Description This option configures whether or not to create and populate image and or flight data log files on the microSD card onboard the GeoSnap system Set up which way your camera is oriented relative to the direction of flight Default String 27 Camera_ install orientation 0 Values 0 camera top facing forward default l camera left facing forward 2 camera bottom facing forward choose this for ADC Snap 3 camera right facing forward Description This option allows you to configure how the yaw value is saved i
4. CSEOSNAP EXPRESS Tetracam User Guide 6 19 15 Manual created Contents HERO QUICTION is inccacewscwcsnasesoustendeysccas sneer EEEE EEE 1 Tne Geo 91 Og p 4 0 ciclo aan ne aren nnn eT Ta 2 SV SCC COO WGC Seese irinn rE E E ons 3 SUE S IN hasan as recess ee acts es accesses esses ewase cannes see sus as teveesseaecessenetessseaue 5 Installing the GeoSnap Express ON TetracaM CAMELAS cscccccssscceceesececeeseceeeeeceeeaesecessuseceesenes 6 Using the 6 position I O port for external triggering ccccccccccccccsseesceeeeeeseeeceeeececeseeeeeeeeeaaeees 9 Powering the GeoSnap system acca ntsvesandutesaecateeem ct satenameseeace ed qutcee co taenceadsinemeiewecerdaut secsteeecetioe 10 EED COTO ara sere eee nce re seg snes actor coe sae ane sees satanic E E O 10 Loading new firmware Onto the GeOSnap SYSTEM ccccccsseccccsscceceeseceeceeceeeeesecesseeceseeeeeeeeas 12 GeoSnap System Files s sssscssescsscssescssoscesoscssoscssescssescssesessesossesoessscssescssescesescesescssoscssoscose 13 COANE AU ON E a A E 14 Fent Cle Gel OE TC ar E E 21 PA SOS TE aara E scatter see va na tuGemeawe eaeece coun cares eee ee 23 MOUS Noting ea secicssecs ccna ct cnesacauee ss edorocsaecaane N stecasseesautawsncuncnssconesneneaneeets 24 PREGUGIIUY asked QUST ONS cicicesecacassaciendecenacaseuctienesunasaeatunsbaieauecosaeusteiesesanenadueaieneesenuncereunnss 25 Specifications amp Settings oncincsicswsceccccswssvesstessweccauns
5. Express TC User Guide a Troubleshooting Frequently asked questions D Field of View 2014 GeoSnap Express TC User Guide 25 Specifications amp Settings In this section e Physical specifications e Power specifications e 6 position I O port specifications e MicroSD card specifications e Camera settings Field of View 2014 GeoSnap Express TC User Guide M ag Specifications amp Settings Physical specifications Antenna connector clearance 18 50 34 54 JoU 74 68 Loy 20 66 GeoSnap Express control unit dimensions in millimeters GeoSnap Express TC Weights Component Control unit with microSD card 35g GPS antenna w 0 75m cable 40g Total system weight 75g Field of View 2014 GeoSnap Express TC User Guide 27 Specifications amp Settings Power specifications GeoSnap Express TC Power Requirements Parameter Value Voltage input range 9 to 15 V Current input when powerin l j l j i 0 35 A ADC Lite Micro or Snap Current input GeoSnap only 0 1A 6 position O port specifications 6 Position I O Port Pinout Position Label Voltage Description 1 Ground 2 RS232 in 15 to 15V Not currently operational 3 RS232 out 15to15V Not currently operational 4 Trigger O to 5V Control GeoSnap by driving this line high or low 5 Trigger power 3 3V VCC line for external triggering 6 VCC 3 3V MicroSD card specifications The MicroSD Flash Storag
6. a Distill raw camera image gps data logs into a GPS file used for auto refining LAT LON information in RAW and DCM files Distill new logs after transfer C Write matching KML file F TTCDISKO Camera type is ADC CAMERA Formatted FAT 380 images on drive O logs on drive Free space 1681326080 Image folder is F TTCADC USBDISK True Required settings GPS Baud rate must be set to 115200 Enable GPS Heartbeat must be unchecked Logging must be turned off The Tetracam camera settings you use will depend on the parameters of your mission but the TTCDISKO Save Files As DCM 10 bit RAW 10 bit GPS Baud 115200 Enable GPS Heartbeat Enable GPS Display Logging Off s Video NTSC Exposure mSec 01 50 Set 00 00 to use Auto Exp required settings listed above must be enabled in order for your GeoSnap system to work properly with the camera Field of View 2014 GeoSnap Express TC User Guide 29 Specifications amp Settings All settings Descriptions of ALL the camera settings are provided below for reference Most of the information provided here comes from the PixelWrench 2 help menu For the latest documentation on Tetracam cameras please visit their website Select Settings to Retrieve To view the settings for any camera select one from the list in the upper box For ADC cameras the identification will read TTCDISKO for MCA cameras the Master cam
7. a Specific Setup 8888 GeoSnap system baud rate for communication with the Tetracam camera 2 Tc_baud 0 115200 default 57600 38400 19200 9600 Suffix to be appended to the TTC image number in the GeoSnap system image log 3 Image_suffix 0 TIF default dvi TIF gt _Ndvi gt JPG _Ndvi JPG gt none eeeeeeeeeee Triggering Options eeeee Mode that determines when the GeoSnap system sends a trigger command 4 Trigger_mode 0 onboard button only default time Field of View 2014 GeoSnap Express TC User Guide 14 GeoSnap System Files GeoSnap system baud rate for communication with the Tetracam camera Default String 2 TC baud 0 Values 0 115200 default 57600 38400 19200 9600 I GW N KF Description This option allows you to specify at what baud rate the GeoSnap system communicates with the Tetracam camera A matching baud rate must be manually configured on the camera It is strongly recommended that you use the default baud rate Suffix to be appended to the TTC image number in the GeoSnap system image log Default String 3 mage suffix 0 Values different for ADC Lite Micro Snap and Micro MCA Description This option allows you to specify what file extension will be appended to the image file names The options are designed to cover most situations however if you need a different naming conven
8. a or with an external signal input Only allow time mode distance mode or fast as possible mode above a specified WGS84 altitude Default String 13 Enable altitude limit 0 Values 0 feature disabled default l feature enabled Description This option allows you to constrain the GeoSnap so that it pauses image triggering when the aircraft is below a certain WGS 84 altitude Any time mode distance mode or fast as possible mode triggering will only be allowed when the aircraft is above a specified altitude This is useful to prevent image capture while the aircraft is on the ground Field of View 2014 GeoSnap Express TC User Guide 18 GeoSnap System Files WGS84 altitude limit Default String 14 Minimum altitude m 50 Values 1 65536 meters to the nearest meter Description This option configures the altitude limit associated with the altitude limit option The altitude limit option must be enabled for this to take effect This is configurable in one meter intervals only Any decimals entered will be truncated Associate and log position attitude data at the moment the trigger command is sent not when capture verification is received Default String 15 Blind logging 0 Options 0 feature disabled default l feature enabled Description This option allows you to ignore capture verification completely and associate and log position attitude data at the time that the trigger command is sent
9. ccsnensouvewesedeonnnes sousakeanesseussnussbesedepensaweseancsye 26 Physical specificaliON Seeds cocsinccnsssaccubsexeatesecmsnedisovsnossstoneubanvontetsebcasdiseveaeannstedeebaeviatecrstsaeabcovsetess 27 Power speciCAUONS onanirao S 28 6 position I O port specifications sssssessssseeeessssrrrrrrtttrtrrrrreressssssrrrrtttttttrteerusssssrusrettrrrrrreeees 28 MicroSD card SpecilicaUd NS ssns aA 28 ONC a SOULS Saas E E EE E T E E EE E E E E EET EE 29 Field of View 2014 GeoSnap Express TC User Guide Introduction In this section e The GeoSnap Express e System components Field of View 2014 GeoSnap Express TC User Guide 4 Introduction The GeoSnap Express The Field of View GeoSnap system was developed to integrate with cameras to streamline integration facilitate intelligent triggering and produce a valuable log of position attitude conditions at the moment of image capture Field of View 2014 GeoSnap Express TC User Guide Introduction System components Note these images are for the GeoSnap Pro system so there are a few differences but the ports interfaces are the same between the Pro and the Express GeoSnap Control Unit 1 6 position I O port 3 MicroSD card slot 2 Power input 4 Onboard button ADC Lite Micro Snap Accessories 1 GPS antenna 4 6 position I O wires 2 2 MicroSD card adapter 5 2 position housing spare pins 3 Velcro mounting patch 6 Power pigtail Fie
10. e Card microSD card for short is used to log flight telemetry and image telemetry data on board the GeoSnap system control unit The card used must meet the following requirements e MicroSD SDHC e Sandisk Ultra MicroSD recommended e System successfully tested with 4GB 8GB and 16GB SDHC cards e Formatted as FAT32 exFAT is not supported To use a new microSD card in the GeoSnap system make sure it meets the requirements above and is blank Insert the card into the system power on and wait for a couple seconds then power down and remove the card The card will have been populated with a default CONFIG file that you can then edit to your requirements Field of View 2014 GeoSnap Express TC User Guide 58 Specifications amp Settings Camera settings To modify the Tetracam camera settings connect the camera in USB disk mode to a computer loaded with PixelWrench2 via USB Alternatively remove the camera s memory card and connect it to the computer with a card reader most of the settings can also be changed using the button box and a monitor Open the PixelWrench2 application then go to View gt Launch GPS Distiller Transfer all images and logs from Tetracam USB Diskmode cameras Erase Camera Transfer Files Info C Transfer only new files Erase files after transfer Image Transfer and GPS Log Distiller Tool Ver 1 0 5 4 Done found 1 camera 380 images in camer
11. era is always TTCDISK8 the slaves are TTCDISK1 2 etc The current firmware revision is indicated at the top of the panel Save Files As ADC Air Lite and Micro cameras can capture images in three different formats Below is the image size and cycle time for the different formats These values are applicable for the ADC Air Lite and Micro Format Image Size full resolution Single Shot Cycle Time note that these cycle times represent the fastest the camera can trigger itself in when set in continuous capture mode with a 0 sec delay The cycle minimum time will be longer if the GeoSnap or any external device is triggering the camera Resolution ADC Air Lite and Micro cameras can capture images at full size 1 2 or 1 4 size In every case the full sensor area is sampled resulting in the same full field of view At 1 2 and 1 4 resolution is sub sampled resulting in lower ground resolution smaller file sizes and a proportionally faster image capture rate Continuous Capture Capture Delay Check to place the camera into toggled continuous capture mode Pressing the shutter release will start the camera capturing an image as quickly as it can depending on the file type To introduce a fixed delay between images enter the delay in seconds in the Capture Delay box Unchecking the Continuous Capture box places the camera in normal single shot capture mode Next Image No Enter the number you want the camera to start naming files a
12. g and holding the LED LED trigger button for approximately 3 seconds This signifies that all data logging has stopped and it is safe to power down the system Capturing Images Red LED Green LED Meaning Quick double flash A trigger command has been sent Illuminates The board is receiving the signal from the synchronously with camera that it captured an image shutter release Field of View 2014 GeoSnap Express TC User Guide Ti Getting Started Red LED Green LED Meaning Flashing slowly Flashing slowly MicroSD card error Occurs when there is alternating with alternating with Red no card the card is not seated properly Green LED LED the card is full or if the log file number exceeds 999 Loading new firmware onto the GeoSnap system If you need to load new firmware on your GeoSnap system follow these steps Erase all data from the microSD card Copy the firmware file FOV fwu onto the microSD card and insert the card into the GeoSnap system 3 Power the GeoSnap system it will flash alternating red and green LEDs for a couple of seconds until the firmware is loaded and it automatically erases the firmware file from the microSD card Field of View 2014 GeoSnap Express TC User Guide 12 GeoSnap System Files In this section e Configuration file e Flight data log file e Image log file Field of View 2014 GeoSnap Express TC User Guide i GeoSnap System Files Configuration file
13. he file Edit the file as you would just as if a camera were attached To save the file make sure the box is checked and click Save Settings A folder browser will appear allowing designation of a folder to which the file will be saved Field of View 2014 GeoSnap Express TC User Guide
14. ith a letter appended to it with the following convention 000 FLT txt OOO FLTA txt OOO FLTB txt 000 FLTC txt etc FLT files store telemetry information from the position attitude data source Information is logged as plain ASCII text in space separated columns each column is exactly 14 characters wide Field of View 2014 GeoSnap Express TC User Guide 21 GeoSnap System Files Flight Data Log File Columns Column 10 11 12 Fix Status Lookup Table Value Label gpsdate gpstime lat deg lon deg hght wgs84 m roll deg pitch deg yaw deg gstime ms horz_accy m vert_accy m fix_ status Description YYYY MM DD HH MM SS SSS degrees degrees meters degrees degrees degrees milliseconds meters meters 00 01 02 03 No GNSS fix Dead reckoning only 2D fix 3D fix Field of View 2014 Description Date as reported by the GPS receiver Time as reported by the GPS receiver Latitude as reported by the GPS receiver Longitude as reported by the GPS receiver Height above WGS84 ellipsoid The GeoSnap Express does not log roll data so this column is just zeros The GeoSnap Express does not log pitch data so this column is just zeros Ground track heading of the system as reported by the GPS receiver GeoSnap time since power on Horizontal position uncertainty of the GPS receiver Vertical position uncertainty of the GPS receiver Status of the GNSS fi
15. ld of View 2014 GeoSnap Express TC User Guide Introduction Mini MICA Accessories 1 GPS antenna 3 Velcro mounting patch 2 MicroSD card adapter 4 6 position I O wires 2 Field of View 2014 GeoSnap Express TC User Guide Getting Started In this section e Installing the GeoSnap Express on Tetracam cameras e Using the 6 position I O port for external triggering e Powering the GeoSnap system e LED codes e Loading new firmware on the GeoSnap system Field of View 2014 GeoSnap Express TC User Guide 5 Getting Started Installing the GeoSnap Express on Tetracam cameras Note The images below show a GeoSnap Pro system However the method remains the same for a GeoSnap Express ADC Lite installation Plug the 15 pin connector from the GeoSnap system into the pa corresponding slot on the ADC Twist the cable Field of View 2014 GeoSnap Express TC User Guide Getting Started Screw in the two screws on the Place the ADC Lite back containing GeoSnap system case and replace the GeoSnap system on the camera the other two screws on the camera Field of View 2014 GeoSnap Express TC User Guide Getting Started ADC Micro Snap installation Align and place the double sided tape on the camera shown Plug the 15 pin connector from the GeoSnap system into the port on the camera Th 2 Stick the GeoSnap system onto the side of the ca
16. me the GeoSnap system waits for capture verification from the camera before resending the trigger command Default String 7 Resend trig time_ms 2500 Values 0 60000 milliseconds Description This option allows you to set the amount of time the GeoSnap waits for capture verification before resending the trigger command This value should be greater than or equal to the cycle time of the camera This option gives you control over your mission quality control by allowing you to specify the amount of time to wait and see if the camera took a picture before identifying a missed trigger and attempting to salvage the trigger point Use external input signal or onboard button to control time mode fast as possible mode and or distance mode Default String 8 Control mode 0 Values 0 feature disabled default l high input signal enables time mode fast as possible mode or distance mode 2 low input signal enables time mode fast as possible mode or distance mode 3 onboard button starts time mode or fast as possible mode 4 onboard button toggles starts stops time mode or fast as possible mode Description This option allows you to use an external input signal to enable time mode fast as possible mode or distance mode or to use the GeoSnap system onboard button to start and or stop time mode or fast as possible mode If this feature is disabled and the GeoSnap system is in time or fast as possible mode it will star
17. mera as shown Twist the cable Field of View 2014 GeoSnap Express TC User Guide Getting Started Using the 6 position I O port for external triggering The 6 position I O port can be used to interface with the GeoSnap system to control triggering using an external source 6 Position I O Port Pinout Voltage Description 1 Ground 2 RS232 in 15 to 15V Not currently operational 3 RS232 out 15to15V Not currently operational 4 Trigger Oto 5V Control GeoSnap by driving this line high or low 5 Trigger power 3 3V VCC line for external triggering 6 VCC 3 3V Wire installation Wires with pre crimped pins are provided in the GeoSnap system accessories To install a wire into the 6 position locking connector place the wire into one of the empty slots in the 6 position connector with the smooth side of the pin facing up as shown Push the wire in until you hear a click then tug on it slightly to ensure that it seated Repeat this with the other empty slot Triangle signifies position 1 Position numbers f GBB0H80 Field of View 2014 GeoSnap Express TC User Guide Getting Started Triggering The GeoSnap board can be triggered externally by an autopilot or other input by driving the Trigger line position 4 high 3 3 5V or low 0 0 2V depending on the settings you have chosen in the configuration file It is highly recommended that you use the GeoSnap s
18. n the GeoSnap log files Refer to the images below to decide which option fits your camera installation orientation Please note that the sensor in the ADC Snap is backwards relative to the text on the camera label so if you have the camera mounted so that the top of the text is in the direction of flight what appears to be the top of the camera facing forward you will actually have to select option 2 camera bottom facing forward This will also affect all other mounting orientations of the Snap so please be aware of this when selecting this option Field of View 2014 GeoSnap Express TC User Guide 50 GeoSnap System Files f Direction of flight Top forward Left forward Bottom forward Right forward Flight data log file Log files are created in the root directory of the microSD card Depending on the configuration file settings up to two log files are created at power on XXX FLT txt and XXX IMG txt XXX are set so the most recent log files have the largest number ie if 000 FLT txt 001 FLT txt and 003 FLT txt exist on the microSD card the next file on power on will be called 004 FLT txt Both the FLT and IMG files will have matching numbers for a given logging session Telemetry information is continuously appended to the FLT file as it is received from the position attitude data source Files over 3 million lines are prevented to assure timely logging to the microSD card After 3 million lines a new FLT file is created w
19. send a trigger command every time the external input signal sends a voltage transition as listed in the option For example if low gt high input signal is selected the GeoSnap will send a trigger command every time the external input signal transitions from low to high voltage for more information on using an external input signal see the Using the 6 position I O port for external trigging section For mode 1 above specify a time interval in seconds Default String 5 Trigger time sec 2 0 Values 0 1 64800 seconds in tenth of a second increments Description This option sets the amount of time in seconds between trigger commands sent by the GeoSnap system when it is set to time mode triggering This is configurable in tenth of a second increments The trigger mode must be set to 1 in order for this option to have any effect on system operation For mode 2 above specify a distance interval in meters Default String 6 Trigger dist_m 50 Values 1 10000 meters in meter increments Description This option sets the distance in meters between trigger commands sent by the GeoSnap system when it is set to distance mode triggering This is configurable in meter increments Field of View 2014 GeoSnap Express TC User Guide GeoSnap System Files Any decimals entered will be truncated The trigger mode must be set to 2 in order for this option to have any effect on system operation Length of ti
20. t Relative Exposure Sets the relative exposure value on MCA slave cameras The Master camera is nominally set to 100 If the system routinely over or under exposes adjust the Master relative exposure value to effect a global change on all channels See the MCA User Manual for more information Enable High Gain Check the box to force the high gain setting on an MCA slave This is sometimes needed when using a filter of extremely narrow bandwidth or when the passband is near the ends of the sensor response curve Field of View 2014 GeoSnap Express TC User Guide Specifications amp Settings GPS Baud Select the serial baudrate the camera listens at The NMEA standard is 4800 but many receivers will speak at higher rates Enable GPS Heartbeat Check this box to have the camera indicate a GPS sentence received on the video or LCD output Enable GPS Display Check this box to have the camera display GPS data on the video or LCD output The GeoSnap GPS data is not relayed to the Tetracam camera so checking this box will not cause the GeoSnap GPS data to display on the video output Logging Select Off On or Verbose GPS logging Verbose logging records extra information like bad GPS camera input voltage at capture time etc Video Allows selection of the video output signal type Both ADC and MCA cameras support NTSC and several PAL formats The LCD selection is only supported for the ADC Exposure ms Input a fixed expos
21. t sending trigger commands as soon as it is powered If this feature is disabled and the GeoSnap system is in distance mode it will start sending trigger commands as soon as a GPS lock is acquired Field of View 2014 GeoSnap Express TC User Guide T GeoSnap System Files If enabling with an input signal is selected options 1 or 2 time mode distance mode or fast as possible mode triggering will only be allowed when the external input signal is held high or held low depending on the option selected This is useful if images are only desired during a certain portion of the flight If option 3 is selected time or fast as possible triggering won t start until the button is pressed and subsequent button presses will be ignored If option 4 selected time or fast as possible triggering won t start until the button is pressed and subsequent button presses will stop and start the triggering Activate time mode or fast as possible mode when the GeoSnap system detects an initial image capture Default String 9 Initial image activation 0 Values 0 feature disabled default l feature enabled Description This option configures whether to start time mode or fast as possible mode triggering after an initial camera image capture has been detected by the GeoSnap system With option 1 set triggering won t start until the GeoSnap system detects an image capture This image capture could be initiated using the button on the camer
22. tion Geotility has a utility that will create a new image log file with your specified image names Mode that determines when the GeoSnap system sends a trigger command Default String 4 Trigger mode 0 Values 0 onboard button only default l time 2 distance 3 fast as possi ble 4 ow gt high input signal 5 high gt low input signal 6 ow gt high and high gt low input signal Field of View 2014 GeoSnap Express TC User Guide is GeoSnap System Files Description Set this option to specify the mode that the GeoSnap system will use to determine when to send a trigger command When this option is set to onboard button only the GeoSnap can only be commanded to send a trigger command when the trigger button onboard the GeoSnap system is pushed When this option is set to time the GeoSnap will send trigger commands at a uniform time interval that can be specified in the time interval option When this option is set to distance the GeoSnap will send trigger commands at a uniform distance interval calculated from the latitude and longitude obtained from the GPS receiver that can be specified in the distance interval option When this option is set to fast as possible the GeoSnap will command a trigger immediately after receiving capture verification from the camera resulting from the prior trigger command When this option is set to any of the input signal modes options 4 5 and 6 the GeoSnap will
23. ure time in milliseconds or to use an automatic exposure input 00 00 This selection applies only to the master camera Auto Exp Method Selects the auto exposure algorithm used Average sets exposure time based on the average of the entire scene Peak sets an exposure time designed to minimize the number of saturated pixels This selection can only be made on the master camera Set as USBDISK Check this box to create USBDISK INI on the CF card uncheck it to delete USBDISK INI The presence of this file in the root folder of the CF card signals the camera to operate as a USB diskdrive If this file is absent from the root the camera initializes and operates in native SVStream mode Save Settings Click to save any changes you have made This will re write the SETTINGS TXT file s of the camera CF cards If you omit this step any changes you make will be lost Edit amp Save local settings files This box is normally unchecked In this mode clicking the Info button will fetch the settings file from the selected camera and clicking Save Settings will save the current settings back to the selected camera Beginning with version 1 0 2 8 Distiller can open edit and save SETTINGS TXT files to a local disk that is not a camera To open a settings file from disk check the box and click Info A folder browser will appear allowing navigation to a folder containing a SETTINGS TXT file The settings control panel will display the values contained in t
24. x as reported by the receiver GeoSnap Express TC User Guide 22 GeoSnap System Files Image log file IMG files store telemetry information from the GPS IMU at the moment of image capture Table 8 lists the information that is logged Information is logged as plain ASCII text in space separated columns each column is exactly 14 characters wide Image Log File Columns Column Label Description 1 image name Image name counter 2 gpsdate YYYY MM DD Date as reported by the GPS receiver 3 gpstime HH MM SS SSS Time as reported by the GPS receiver 4 lat deg degrees Latitude as reported by the GPS receiver Longitude as reported by the GPS 5 lon deg degrees l receiver 6 hght wgs84 m meters Height above WGS84 ellipsoid The GeoSnap Express does not log roll 7 roll deg degrees l o data so this column is just zeros l The GeoSnap Express does not log pitch 8 pitch deg degrees l _ data so this column is just zeros Ground track heading of the system as 9 yaw deg degrees l reported by the GPS receiver 10 gstime ms milliseconds GeoSnap time since power on Horizontal position uncertainty of the 11 horz_accy m meters GPS receiver Vertical position uncertainty of the GPS 12 vert_accy m meters l receiver l Status of the GNSS fix as reported by the 13 fix_status receiver Field of View 2014 GeoSnap Express TC User Guide 23 Troubleshooting In this section e Frequently asked questions Field of View 2014 GeoSnap
25. ystem Trigger Power line position 5 to provide the voltage to hold or drive the Trigger line high Triggering using the Trigger line and the Trigger Power line can be accomplished by shorting the two wires together or by using a PWM relay to control voltage level Powering the GeoSnap system When using the GeoSnap system with an ADC Lite or the ADC Micro Snap the camera is powered through the GeoSnap system but you need to power the GeoSnap system from an external source such as a battery or autopilot A power pigtail with a 2 position connector is provided in the GeoSnap system accessories for this purpose An extra 2 position locking connector and extra pins are also provided if you want to make your own power wire harness GeoSnap Express TC Power Requirements Parameter WETS Voltage input range 9 to 15 V Current input when powerin l j l j i 0 35 A ADC Lite Micro or Snap Current input GeoSnap only 0 1A When using the GeoSnap system with a Mini MCA the GeoSnap system is powered from the Mini MCA so you need to power the camera per Tetracam s instructions LED codes The meanings of the LEDs on the GeoSnap board are explained in this section e Blue LED This LED indicates when the board is powered When power is sent to the board this LED shines solid e Red LED amp Green LED These LEDs indicate the status of the GeoSnap system including startup status GPS status triggering and camera capture indications
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