VGOES HDR User Manual
Contents
1. Frequency Mhz 100bps 300bps 1200bps international 401 818750 40 401 819500 80 401 821000 81 401 821750 41 401 822500 82 401 824000 83 401 824750 42 401 825500 84 401 827000 85 401 827750 43 401 828500 86 401 830000 87 401 830750 44 401 831500 88 401 833000 89 401 833750 45 401 834500 90 401 836000 91 401 836750 46 401 837500 92 401 839000 93 401 839750 47 401 840500 94 401 842000 95 401 842750 48 401 843500 96 401 845000 97 401 845750 49 401 846500 98 401 848000 99 401 848750 50 401 849500 100 401 851000 101 401 851750 51 401 852500 102 401 854000 103 401 854750 52 401 855500 104 401 857000 105 401 857750 53 Appendix A DCPRS Transmit Frequencies Frequency Mhz 100bps 300bps 1200bps international 401 858500 106 401 860000 107 401 860750 54 401 861500 108 401 863000 109 401 863750 55 401 864500 110 401 866000 111 401 866750 56 401 867500 112 401 869000 113 401 869750 57 401 870500 114 401 872000 115 401 872750 58 401 873500 116 401 875000 117 401 875750 59 401 876500 118 401 878000 119 401 878750 60 401 879500 120 401 881000 121 401 881750 61 401 882500 122 401 884000 123 401 884750 62 401 885500 124 401 887000 125 401 887750 63 401 888500 126 402. Chapter 4 Programming transmitter mode STOP v1 0 1 configuration alarm random automatic data 1 message count lt no gt 1 2 supply voltage lt no gt 2 3 forward power no 3 4 reverse power lt no gt 4 5 file age lt no gt 5 6 file length lt no gt 6 1 This option adds a count to the transmitted message A separate count it main tained for both self timed and random transmissions If the message format is ASCII then the count will be shown using two characters representing an 8 bit 00 to ff hexadecimal number If the format is pseudo binary then the count will be shown as one 6 bit pseudo binary digit If the format is binary one 8 bit byte will be used 2 This option adds the supply voltage to the output message It is measured while transmitting carrier right before the message is transmitted Power consump tion is greatest when transmitting carrier so this can be regarded as a worst case battery voltage The value is in 1 4 Volt increments 3 This option adds the forward power reading to the output message It is mea sured while transmitting carrier right before the message is transmitted The measurement is not very accurate but it should be fairly constant The value is expressed in 1 4 Watt increments 4 This option adds the reverse power reading to the output message It is mea sured while transmitting carrier right before the message is transmitted The measurement is not very accurat
3. Power Supply 2 pin terminal block ground power The power supply input has reverse voltage protection and is current limited to 7A by a non resettable fuse SDI 12 3 pin terminal block data ground power SDI 12 power supply output is from 10 5 to 15VDC Current is limited to 1 5A by a time delay resetting fuse GPS Receiver Antenna Trimble GPS Antenna part number 39265 50 e 5m cable length e 3 1mm connector 1 http www valcom ca Guelph products vhighfreq crossed yagi photo html Chapter 1 Specifications Chapter 2 Configuration Profiles Approval to Transmit Before transmitting with the Valcom VGOES permission must be obtained from NESDIS U S federal state or local government agencies or users sponsored by one of those agencies are eligible When permission has been obtained NESDIS will assign the following parameters platform ID channel number bit rate e time slot These parameters must be entered into the transmitter during configuration Self Timed and Random Transmissions Self Timed Typically in this mode a DCP will be configured to send a 30 second message every few hours The specific timing of these transmissions are coordinated by NESDIS Each DCP is allocated specific time slots throughout the day Alarm Random The host computer or data logger typically analyzes acquired data When an alarm condition arises eg water level too high or changing too quickly the
4. en command code 0x02 bit rate 100bps 0x01 300bps 0x02 1200bps 0x03 channel byte 1 channel byte 0 interval days not supported by VGOES interval hours interval minutes interval seconds offset hours offset minutes offset seconds 12 13 message window size in seconds preamble long 0x00 short 0x01 not supported by VGOES the long preamble is used when transmitting on an international channel otherwise the short preamble is used interleaver none 0x00 long 0x01 short 0x02 checksum byte 1 checksum byte 0 Chapter 4 Programming response format 1 result code ACK 0x06 or NAK 0x15 Set Random Messaging command format command code 0x03 bit rate 100bps 0x01 300bps 0x02 1200bps 0x03 channel byte 1 channel byte 0 interval hours interval minutes 1 2 3 4 5 interval days not supported by VGOES 6 7 8 interval seconds 9 interleaver none 0x00 long 0x01 short 0x02 10 checksum byte 1 11 checksum byte 0 response format 1 result code ACK 0x06 or NAK 0x15 Set Operational Mode command format 1 command code 0x04 2 mode stop 0x01 run 0x03 3 checksum byte 1 4 checksum byte 0 response format 1 result code ACK 0x06 or NAK 0x15 Transmit Random Message 19 Chapter 4 Programming command format 1 command code 0x0B not supported by VGOES 2 checksum byte 1 3 checksum byte 0 response format 1 result code ACK 0x06
5. b r 0x3 XETX DC3 3 C S 0x4 XEOT DC4 4 D T d t 0x5 XENQ XNAK 5 E U e u 0x6 XACK XSYN amp 6 F V f 0 7 7 G VV g w 0x8 BS XCAN 8 H X h x 0x9 HT EM 9 I Y i y OxA LF SUB t J Z j 7 OxB VT ESC K k 0xC FF FS D L N 1 OxD CR XGS M m OxE SO XRS gt N A n OxF SI XUS O _ o DEL Table B 2 Illegal Characters Isb 0 00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x0 DLE 0x1 SOH 0x2 STX 0x3 ETX 0x4 EOT 0x5 ENQ NAK 0x6 ACK SYN 0x7 ETB 0x8 CAN 0x9 0 OxB 0 0xD GS OxE RS OxF US 39 Appendix B Character Sets 40 Table B 3 Domestic Character Set Isb 0x00 0 10 0x20 0x30 0x40 0x50 0x60 0x70 0x0 NUL SPACE 0 P p 0x1 DC1 1 A Q a q 0x2 DC2 2 B R b r 0x3 DC3 3 C S 0 4 DC4 4 D T d t 0x5 5 E U e u 0x6 amp 6 F V f 0 7 BEL 7 G VV g w 0x8 BS 8 H X h x 0x9 HT EM 9 I Y i y OxA LF SUB J Z j 7 OxB VT ESC k 0 FS lt 1 0xD CR M m OxE SO 2 gt N 2 OxF SI 2 2 o DEL Table B 4 International Character Set Isb 0 00 0 10 0 20 0x30 0x40 0x50 0x60 0x70 0x0 SPACE 0 P 0x1 1 A Q 0x2 2 B R 0x3 3 C S 0x
6. elevation 39 92318138579852 azimuth 174 29537983098888 46 Appendix E NESDIS NOAA Certification National Environmental Satellite Data and Information Service Certificate Number 0206020 Certifies that Valcom Transmitter Model VGOES HDR Has been type tested and meets the requirements for use in the Geo stationary Operational Environmental Satellite Data Collection System Condition If design changes or modifications are made that affect its technical performance as specified in the certification standards for this type of equipment recertification of this model shall be required before placing in operation Goes Domestic Random operations for 100bps aud 300bps aud 1200bps data rates GOES Domestic 00bps und 300 bps and 1200bps data rates interustional DOS 5clf Timed operations for 190bps 47 Appendix E NESDIS NOAA Certification 48
7. elevation start lon start lat start alt finish lon finish lat finish alt let start position spherical gt cartesian earth radius start alt 90 start lat start lon finish position spherical gt cartesian earth radius finish alt 90 finish lat finish lon diff map finish position start position vect cartesian gt spherical car diff cadr diff caddr diff elev cadr vect 90 start lat if gt elev 0 90 elev 90 elev define azimuth start lon start lat start alt finish lon finish lat finish alt letx start position spherical gt cartesian earth radius start alt 90 start lat start lon finish position spherical gt cartesian earth radius finish alt 90 finish lat finish lon diff map finish position start position vect cartesian gt spherical car diff cadr diff caddr diff dir caddr vect start lon if gt start lat finish lat 180 dir dir here is an example calculation define my longitude 80 078831 define my latitude 43 418079 define my altitude 0 100 100m 45 Appendix D Antenna Orientation newline display elevation display elevation my longitude my latitude my altitude goes east longitude goes latitude goes altitude newline display azimuth display azimuth my longitude my latitude my altitude goes east longitude goes latitude goes altitude the output
8. random regular append message log 1 random alarm enabled 1 random alarm platform id 32 random alarm interval 17 random alarm window size 17 random alarm repeat count 4 random alarm channel 9 random alarm bit rate 2 random alarm interleaver 2 random alarm format 2 random alarm append count 1 random alarm append v 1 random alarm append forward 1 random alarm append reverse 1 random alarm append file age 1 random alarm append file size 1 random alarm append message 1log 1 self timed enabled 1 Self timed platform id 32 self timed interval 17 self timed interval offset 17 self timed window size 17 Self timed repeat count 4 self timed channel 9 self timed bit rate 2 self timed interleaver 2 self timed format 2 Self timed append count 1 lf timed append v 1 lf timed append forward power 1 lf timed append reverse power 1 d d lf tim append file age 1 lf tim append file size 1 nm nun un u 11 Chapter 4 Programming unsigned int self_timed_append_message_log 1 __attribute__ packed configuration t Terminal Menu 12 The menu system can be used to configure the transmitter switch operating modes and monitor the status Menu items are selected by entering the menu item number The Esc key is used to back out of a menu and the EN
9. IX DF amp WN m o longitude byte 3 m longitude byte 2 m N longitude byte 1 OA 168 longitude byte 0 elevation byte 3 al elevation byte 2 A Oo elevation byte 1 N elevation byte 0 OA magnetic variation byte 3 A o magnetic variation byte 2 N e magnetic variation byte 1 N A magnetic variation byte 0 N N checksum byte 1 N checksum byte 0 24 Chapter 4 Programming Data Transfer Commands Select Data Buffer command format 1 command code 0x32 2 buffer selection self timed 0x00 random 0x01 response format 1 result code ACK 0x06 or NAK 0x15 Insert to Buffer command format 1 command code 0x20 2 null terminated string 7bit characters 8th bit is odd parity 3 checksum byte 1 4 checksum byte 0 response format 1 result code ACK 0x06 or NAK 0x15 Append to Buffer command format 1 command code 0x21 2 null terminated string 7bit characters 8th bit is odd parity 3 checksum byte 1 4 checksum byte 0 response format 1 result code ACK 0x06 or NAK 0x15 25 Chapter 4 Programming Notes 1 http www columbia edu kermit kermit html 2 http msdn microsoft com library default asp url library en us randz protocol hyperterminal kermit file transfer asp 3 http www campbellsci com 26 Chapter 5 Message Retrieval DCS Automated
10. Processing System DAPS The DAPS CDA Command and Data Acquisition ground station in Wallops VA provides many support services for the GOES system Users can log on to their servers using dial up modems or via the Internet using the telnet protocol See the DAPS web site for more information Local Readout Ground Station LRGS The DAPS station broadcasts all Data Collection Platform messages over a domestic communications satellite DOMSAT The LRGS is a ground system that receives this data stream and provides a mechanism that allows client programs running on other machines to connect and retrieve DCP messages Users can set up their own LRGS or use the LRGS servers maintained by NESDIS They have the DROT machine that receives its data through a DOMSAT link just as any LRGS at a user site would and the CDADATA machine that receives data through a direct wire connection from DAPS See the Wallops CDA site for more information Message Format Here is an example of a message downloaded from the DAPS ground station C010103406036153300G45 0NN195EFF00195 HG 3 5 0 0220 0 0260 0 0260 lt gt The following is a break down of the information fields C0101034 1 06 2 036 3 153300 4 G 5 45 6 0 7 N 8 N 9 195 10 E 11 FF 12 00195 13 14 HG 3 5 0 0220 0 0260 0 0260 15 1 DCP address 2 Year 3 Julian day of year In this example the date is February 5th 2006 4 Hour
11. next transmission Date stamps marked as no time indicates that the transmitter time was not syn chronized using GPS yet The time stamp will be the time since reset GPS is currently powered off 1 Antenna Feedline is OK Almanac is valid time valid 3 days 23 56 39 without GPS 2 GPS UTC offset is 14 seconds 14 3 time required for last GPS synchronization 1 minutes and 14 seconds 4 oscillator offset is 75 5 oscillator table offset is 10 6 last drift rate correction 3ms day 14hz 401Mhz 7 last drift correction 0 038ms 8 uptime 0 days 00 43 50 9 maximum drift correction 0 047ms 3 GPS sync s and 0 timout s transmissions 3 speed switches 3 total drift correction 0 009ms total drift rate correction 3ms day 14hz 401Mhz next tx 8 19 01 02 self timed alarm is not set 10 1 2 3 Information from the GPS unit is displayed first Reception status will be shown while the transmitter is performing a frequency calibration or time synchroniza tion Reception improves once the Almanac is received from the GPS satellite system so the GPS unit is kept powered until it has been received This line shows information on the time accuracy The VGOES will transmit only if the time is accurate to within 0 5 seconds To meet this requirement it needs to sycnronize with the time from the GPS unit at least every four days This line shows the difference between UTC time and GPS ti
12. or NAK 0x15 Diagnostic Commands Read Time command format 1 command code 0x11 response format 1 result code ACK 0x06 or NAK 0x15 2 hours 0x99 will be returned if the time has not been synchronized with GPS 3 minutes 0x99 will be returned if the time has not been synchronized with GPS 4 seconds 0x99 will be returned if the time has not been synchronized with GPS Read Status command format 1 command code 0x09 2 checksum byte 1 3 checksum byte 0 response format 1 result code ACK 0x06 or NAK 0x15 2 command code 0x09 3 number of bytes in self timed buffer byte 1 4 number of bytes in self timed buffer byte 0 20 14 15 16 17 18 Chapter 4 Programming time to next timed transmission days time to next timed transmission hours time to next timed transmission minutes time to next timed transmission seconds number of bytes in random buffer byte 1 number of bytes in random buffer byte 0 11 12 13 time until start of random interval hours time until start of random interval minutes time until start of random interval seconds The logger will usually be set up to write its data at the start of random inter val The data is transmit at some time within the interval failsafe clear 0x00 tripped 0x01 volts supply voltage measured while transmitting the last message tenths of Volts GPS acquisition time time required to sync
13. 1 890000 127 401 890750 64 401 891500 128 401 893000 129 401 893750 65 401 894500 130 401 896000 131 401 896750 66 401 897500 132 33 Appendix A DCPRS Transmit Frequencies 34 Frequency Mhz 100bps 300bps 1200bps international 401 899000 133 401 899750 67 401 900500 134 401 902000 135 401 902750 68 401 903500 136 401 905000 137 401 905750 69 401 906500 138 401 908000 139 401 908750 70 401 909500 140 401 911000 141 401 911750 71 401 912500 142 401 914000 143 401 914750 72 401 915500 144 401 917000 145 401 917750 73 401 918500 146 401 920000 147 401 920750 74 401 921500 148 401 923000 149 401 923750 75 401 924500 150 401 926000 151 401 926750 76 401 927500 152 401 929000 153 401 929750 77 401 930500 154 401 932000 155 401 932750 78 401 933500 156 401 935000 157 401 935750 79 401 936500 158 401 938000 159 Appendix A DCPRS Transmit Frequencies Frequency Mhz 100bps 300bps 1200bps international 401 938750 80 401 939500 160 401 941000 161 401 941750 81 401 942500 162 401 944000 163 401 944750 82 401 945500 164 401 947000 165 401 947750 83 401 948500 166 401 950000 167 401 950750 84 401 951500 168 401 953000 169 401 953750
14. 17 03 2006 18 00 03 vedas inserted 119 bytes into self timed buffer Chapter 4 Programming 4 This line shows how long it took for the last GPS synchronization GPS syncs start two minutes before every transmission They are aborted if they don t com plete before the transmission If the GPS Almanac is not valid another sync is started after the transmission The extra sync will timeout after 17 minutes 5 This line shows the offset applied to fine tune the main crystal oscillator fre quency The number is an 8bit hexadecimal number 6 This line shows the difference between the transmitter s built in temperature vs offset table and the actuall offset calculated using the GPS This number should stay fairly constant over temperature changes and drift slowly as the oscillator ages 7 This line shows how much frequency change there was by the last GPS sync 8 This line shows how much the time was moved forward or backward by the last GPS sync 9 These lines show the running statistics of the transmitter 10 This line shows information about the next scheduled transmission The process slots menu item displays information about the processes that are cur rently running A process slot is a set of resources used by a running process The firmware reserves enough resources for a maximum of 12 processes slot 0 stage 2 ALMANAC STARTED 1 slot 1 stage 1 GPS handling 82 1 bytes 12 slots free 10 of 12 2 1
15. 202 The bit rate menu item selects the bit rate 13 Chapter 4 Programming 14 9 The interleaver menu item is used to selection an interleaver The interleaver is an optional feature of HDR GOES that enhances the system s ability to correct transmission bit errors Using this feature may help if messages are being cor rupted by adjacent channel interference or other sources of burst RF interference 10 The format menu item selects the message data character set The available for mats are ascii pseudo binary and binary See Appendix B for more informa tion on each character set 11 The automatic data menu item is used to add extra information to the output message transmitter mode STOP v1 0 1 1 2 3 4 5 6 7 8 9 configuration regular random 1 lt disabled gt 1 2 platform id C0101034 2 3 interval 00 10 00 3 4 window size fixed at 3 seconds 4 5 data repeat 0 5 6 channel 195 6 7 bit rate lt 300bps gt 7 8 interleaver none 8 9 format lt ascii gt 9 Jautomatic data 10 The enabled disabled menu item controls whether or not this type of transmis sion will be scheduled The platform id menu item is used to set the platform id for this type of trans mission This id is sent along with each transmission so the receiving station can identify the sender The interval menu item is used to set the average interval between transm
16. 4 4 D T 0x5 5 E U 0x6 6 F V 0x7 7 G VV 0x8 8 H X 0x9 9 I Y OxA LF J Z OxB K 0 2 L N 0xD CR M OxE N OxF O Table B 5 Pseudo Binary Character Set Isb 0 00 0 10 0x20 0x30 0 40 0x50 0x60 0x70 Appendix B Character Sets Isb 0 00 0 10 0x20 0x30 0 40 0x50 0x60 0x70 0x0 P Ox1 q o 0x2 r 0x3 er gt 0x4 0x5 0x6 0x7 ajo Jaja 0x8 0x9 OxA x OxB 0xC OxD N lt x z lt fe gt In 4 10515510 70 0 O Z lt OIA IH ILIA mn g 6 gt 5 8 1 OxF DEL 41 Appendix B Character Sets 42 Appendix C Serial Communcation and Power Cable Cabling to the VGUES Serial and Power Connector The serlal gnd cable Is optional becouse one power cable also SERIAL GND TXDATA RXDATA RXDAT TXDATA 24 AWG For serlal cables 1 2 3 4 3 6 7 8 3 20 AWG for power cables 18 or 16 AWG for lengths reater than 50 cm 9 Suggested Mating Connector D Sub 15 socket female Norcomp 180 015 202 001 Solder cups only accept up to 20 AWG wired Note To not connect to sockets not identified in the drawing They are used for factory testing 43 Appendix C Serial Communcation and Power Cable 44 Appendi
17. 40000 27 401 740750 14 401 741500 28 401 743000 29 401 743750 15 401 744500 30 401 746000 31 401 746750 16 401 747500 32 401 749000 33 401 749750 17 401 750500 34 401 752000 35 401 752750 18 401 753500 36 401 755000 37 401 755750 19 401 756500 38 401 758000 39 401 758750 20 401 759500 40 401 761000 41 401 761750 21 401 762500 42 401 764000 43 401 764750 22 401 765500 44 401 767000 45 401 767750 23 401 768500 46 401 770000 47 401 770750 24 401 771500 48 401 773000 49 401 773750 25 401 774500 50 401 776000 51 401 776750 26 401 777500 52 Appendix A DCPRS Transmit Frequencies Frequency Mhz 100bps 300bps 1200bps international 401 779000 53 401 779750 27 401 780500 54 401 782000 55 401 782750 28 401 783500 56 401 785000 57 401 785750 29 401 786500 58 401 788000 59 401 788750 30 401 789500 60 401 791000 61 401 791750 31 401 792500 62 401 794000 63 401 794750 32 401 795500 64 401 797000 65 401 797750 33 401 798500 66 401 800000 67 401 800750 34 401 801500 68 401 803000 69 401 803750 35 401 804500 70 401 806000 71 401 806750 36 401 807500 72 401 809000 73 401 809750 37 401 810500 74 401 812000 75 401 812750 38 401 813500 76 401 815000 77 401 815750 39 401 816500 78 401 818000 79 31 Appendix A DCPRS Transmit Frequencies 32
18. 5 ASCII format pseudo binary if both ASCII and binary are set bit 6 binary format bit 7 odd parity bit this is not a flag The following table shows the different character representations for the flag byte format no GPS reception clock updated ASCII SPACE 1 Pseudo Binary b Binary B 15 Message data this is the data received from the logger 1 http dcs noaa gov 2 http cdadata wcda noaa gov Appendix A DCPRS Transmit Frequencies Frequency Mhz 100bps 300bps 1200bps international 401 701000 1 401 701750 1 401 702500 2 401 704000 3 401 704750 2 401 705500 4 401 707000 5 401 707750 3 401 708500 6 401 710000 7 401 710750 4 401 711500 8 401 713000 9 401 713750 5 401 714500 10 401 716000 11 401 716750 6 401 717500 12 401 719000 13 401 719750 7 401 720500 14 401 722000 15 401 722750 8 401 723500 16 401 725000 17 401 725750 9 401 726500 18 401 728000 19 401 728750 10 401 729500 20 401 731000 21 401 731750 11 401 732500 22 401 734000 23 401 734750 12 401 735500 24 401 737000 25 401 737750 13 29 Appendix A DCPRS Transmit Frequencies 30 Frequency Mhz 100bps 300bps 1200bps international 401 738500 26 401 7
19. 85 401 954500 170 401 956000 171 401 956750 86 401 957500 172 401 959000 173 401 959750 87 401 960500 174 401 962000 175 401 962750 88 401 963500 176 401 965000 177 401 965750 89 401 966500 178 401 968000 179 401 968750 90 401 969500 180 401 971000 181 401 971750 91 401 972500 182 401 974000 183 401 974750 92 401 975500 184 401 977000 185 401 977750 93 35 Appendix A DCPRS Transmit Frequencies 36 Frequency Mhz 100bps 300bps 1200bps international 401 978500 186 401 980000 187 401 980750 94 401 981500 188 401 983000 189 401 983750 95 401 984500 190 401 986000 191 401 986750 96 401 987500 192 401 989000 193 401 989750 97 401 990500 194 401 992000 195 401 992750 98 401 993500 196 401 995000 197 401 995750 99 401 996500 198 401 998000 199 401 998750 100 401 999500 200 402 001000 402 002500 202 1 402 004000 402 005500 204 2 402 007000 402 008500 206 3 402 010000 402 011500 208 4 402 013000 402 014500 210 5 402 016000 402 017500 212 6 402 019000 402 020500 214 7 402 022000 402 023500 216 8 402 025000 402 026500 218 9 Appendix A DCPRS Transmit Frequencie
20. Each line shows the status of a running process It shows its stage and a short description of the task 2 The last line shows the number of slots available CSI Compatible Loggers The CSI format specification is by Campbell Scientific Inc This is the format used by Valcom s VEDAS II logger Commands that change the configuration are only accepted when in stop mode and most of the diagnostic or buffer commands only work properly while in RUN mode A reset is performed when the unit changes mode The VGOES automatically enters CSI compatibility mode when it receives a BREAK on the serial line handles the incoming CSI command and switches back If it doesn t receive a command within two or three seconds it will switch back out of CSI mode automatically As soon as the VGOES enters CSI mode it will send an STX 0x02 If for some reason the command is rejected VGOES will return NAK 0x15 If the command is accepted VGOES will return ACK 0x06 followed by the appropriate response for the given command Configuration Commands 17 Chapter 4 Programming 18 Set Data Collection Platform ID command format 1 2 3 4 5 6 7 command code 0x01 platform ID byte 3 platform ID byte 2 platform ID byte 1 platform ID byte 0 checksum byte 1 checksum byte 0 response format 1 result code ACK 0x06 or NAK 0x15 Set Self Timed Messaging command format Rh Rh O 14 15 16 IN OS OU Re dq
21. TER key can be used to redisplay the current menu There is a menu item to enter RUN mode but to get back into STOP mode the user has to press ESC five times in a row This is to avoid accidentally entering STOP mode The following is a description of the STOP and RUN mode menus STOP Mode The top line of the menu display shows the current mode and firmware version transmitter mode STOP v1 0 1 1 start program unit set to RUN on power up 1 2 sdi 12 port 2 3 configuration 3 4 check bytes 4 1 The start program menu item will switch the unit into RUN mode This menu item also shows whether the unit will start up in RUN mode or sTOP mode 2 The sdi 12 port menu item starts the transparent SDI 12 communication This interface can be used to configure sdi 12 devices attached to the sdi 12 port 3 The configuration menu option opens the configuration menu 4 The check bytes menu option shows the memory check bytes Check bytes are used to ensure memory has not been corrupted The value of the check byte in each memory area is set so the 8 bit checksum will equal zero The transmitter performs an integrety check before entering RUN mode and reverts to STOP it fails transmitter mode STOP v1 0 1 configuration 1 name default 1 2 stop on power up no start running program on power up 2 3 logger data mode overwrite 3 4 self timed 4 5 regular random 5 6Jalarm random 6 7 reload c
22. VGOES HDR User Manual VGOES HDR User Manual Revision History Revision 1 0 1 12 May 2006 Revised by A L Original Issue Table of Contents Warranty v 1 Specifications RR R 1 General m A toate ce baste a AA 1 Electrical Characteristics nie tee ett ate atten ils detecte vs 1 Machanicals irr nte e bete t crees ebd Der iio 2 Front Panel Conneetots nest eser Rime Eee ERES 2 2 Configuration Profiles U 5 Approval to Iranstmit ei Seem erbe de pete i ecep ehe tes arias 5 Self Timed and Random Transmissions eene enne 5 Selk ROG A IG cel 5 AlarmiRandoOm iie a cet eo bet ci 5 Regular niei egest in aede aoi met eee asas 5 3 System Operation rencores 7 Schedule etude sias etin tiers tee 7 GPS Time Source AA 7 Failsafe Protection a eee e dee ERE e eee Pete des 7 SPUR EE 7 LED Status Information o eerte tene pec ee ans ei ebene ana 7 4 Programming PR 9 VGOES Binary Interface U eene nennen nennen 9 File Name dc 9 Configuration File Format sse eee nennen 10 Terminal Metu oerte deett eme taie detect 12 STOP MEd e orn ede eie edo 12 RUN Mode iri essen ss UR ERE TEE ERIS 15 CSL Compatible Losgers inacci n rg den 17 Configu
23. e but it should be fairly constant The value is expressed in 1 4 Watt increments 5 This option pre appends the age in seconds to each file transmitted 6 This option pre appends the file size to each file transmitted RUN Mode In RUN mode the first line shows the firmware version and the current GMT time The time since reset will be shown until the real time is acquired from GPS transmitter mode RUN v1 0 1 00 00 03 1 event log 1 2 system status 2 3 process slots 3 1 The event log menu item displays a log of the most recent events 2 The system status menu item will show information useful for assessing the overall health of the transmitter 3 The process slots menu item will display information about the running pro cesses 17 03 2006 18 46 12 gt speed down 1 17 03 2006 18 46 09 battery 12 1V reverse power 0 7W forward power 6 5W 17 03 2006 18 46 09 tx done next tx 19 01 02 17 03 2006 18 45 14 drift correction 0 047ms drift rate correction 17 03 2006 18 45 04 vedas inserted 240 bytes into self timed buffer 17 03 2006 18 45 03 select buffer done 17 03 2006 18 44 21 speed up 17 03 2006 18 31 08 speed down SSS aa S 15 3ms day 14 Chapter 4 Programming 16 1 2 Time stamps that have lt and gt are messages that are still in volatile memory They will be written to non volatile memory after the
24. empty file with the key name you want to download then use the Kermit receive function The advantage of this format is that no proprietary host PC software is required Any computer that has a serial port and an implementation of Kermit will work fine Also binary data can be uploaded to the transmit buffers An overview of Kermit can be found online with the Windows Hyperterminal doc umentation See the book by Frank da Cruz titled Kermit A File Transfer Protocol ISBN 0 932376 88 6 for a complete reference File Name Keys MON_RUN_MODE Sending this file key will switch the transmitter into RUN mode Chapter 4 Programming 10 MON_STOP_MODE Sending this file key will switch the transmitter into STOP mode MON_DOWNLOAD_LOG Receive this file key to download the event log MON_DOWNLOAD_CONFIGURATION Receive this file key to download the configuration See the Section called Configura tion File Format for the format MON SELF TIMED BUFFER Send this file key to write data to the self timed transmit buffer The contents of the file will overwrite whatever is currently in the buffer MON SELF TIMED BUFFER PRE APPEND Send this file key to write data to the self timed transmit buffer The contents of the file will be pre appended to whatever is currently in the buffer MON SELF TIMED BUFFER POST APPEND Send this file key to write data to the self timed transmit buffer The contents of the file will be pos
25. fset seconds self timed window size self timed interleaver none 0x00 long 0x01 short 0x02 random bit rate 100bps 0x01 300bps 0x02 1200bps 0x03 random channel byte 1 random channel byte 0 random interval hours random interval minutes random interval seconds Chapter 4 Programming 25 random preamble long 0x00 short 0x01 26 random interleaver none 0x00 long 0x01 short 0x02 27 checksum byte 1 28 checksum byte 0 Read Error Register command format 1 command code 0x0D 2 checksum byte 1 3 checksum byte 0 response format result code ACK 0x06 or NAK 0x15 command code 0x0D error count entry 1 command 1 2 3 4 5 entry 1 error 6 entry 2 command 7 entry 2 error 8 entry 3 command 9 entry 3 error 10 entry 4 command 11 entry 4 error 12 checksum byte 1 13 checksum byte 0 Reset Error Counter command format 1 command code 0x0E 2 checksum byte 1 3 checksum byte 0 23 Chapter 4 Programming response format 1 result code ACK 0x06 or NAK 0x15 Read GPS data command format 1 command code 0x0F 2 checksum byte 1 3 checksum byte 0 response format result code ACK 0x06 or NAK 0x15 time byte 3 seconds since Jan 1 2000 time byte 2 seconds since Jan 1 2000 time byte 1 seconds since Jan 1 2000 time byte 0 seconds since Jan 1 2000 latitude byte 3 latitude byte 2 latitude byte 1 latitude byte 0 MN
26. he re ceiver VGOES uses the pulse per second signal from an integrated GPS receiver to auto matically set the exact time of day and fine tune its crystal oscillator This ensures the RF output is centered properly and minimizes time drift VGOES starts its attempt to synchronize with GPS two minutes before each trans mission The process is canceled if it does not complete before the scheduled trans mit time The transmission will only be skipped if there has not been a full GPS sync within 4 days There are many reasons for a GPS sync to fail but it should be extremely rare for a transmitter to fail enough GPS syncs to skip a transmission The main reason for a fail is bad reception from the GPS satellites They criss cross the sky throughout the day so a clear wide view of the sky will improve reception Also the sync takes longer if the almanac is out of date The software detects this situation and re enables the GPS after the transmission The almanac is a set of information that is continuously re broadcast by the GPS satellites Failsafe Protection SDI 12 In the event of a critical software malfunction failsafe logic will disable the trans mitter It will detect transmissions that are too long and time intervals between suc cessive transmissions that are too short The LED on the front panel will flash red if the failsafe protection has been tripped Holding the push button for 10 seconds will return the transmitter to normal
27. host computer commands the transmitter to set the alarm The transmitter will then begin random transmissions at the programmed alarm rate Special random channels are reserved in which DCP are not assigned specific time slots They transmit when required and introduce randomness in the time between transmissions Messages are usually kept short and Pseudo Binary encoded to mini mize the probability of collisions with other random transmissions For more information please refer to the User s Guide for Random Reporting doc ument prepared for NESDIS NOAA and the U S Department of Commerce Regular Random This mode sends short messages at random times throughout the day It is commonly used in conjunction with Alarm Random if no Self Timed slot has been allocated to confirm the system and sensors are functioning properly Chapter 2 Configuration Profiles Chapter 3 System Operation Scheduling Transmission timing is always accurate to within 0 5 seconds If both self timed and random transmissions are enabled the random transmission will avoid the self timed ones by scheduling around them Note Transmissions only take place if there is data in the buffer to be transmitted GPS Time Source GPS Global Positioning System is a navigational system involving satellites and computers that can determine the latitude and longitude of a receiver on Earth by computing the time difference for signals from different satellites to reach t
28. hronize with GPS tens of seconds checksum byte 1 checksum byte 0 Read Last Message Status command format 1 2 3 command code 0x0A checksum byte 1 checksum byte 0 response format e Q Ne OO em p result code ACK 0x06 or NAK 0x15 command code 0x0A message type self timed 0x00 random 0x01 number of bytes transmitted byte 1 number of bytes transmitted byte 0 foward power reverse power supply voltage tenths of Volts GPS fix time 0x00 if time was not synchronized to GPS oscillator drift signed hundreds of Hertz latitude degrees latitude minutes latitude seconds 21 Chapter 4 Programming 22 14 15 16 17 18 longitude degrees longitude minutes longitude seconds checksum byte 1 checksum byte 0 Read Configuration command format 1 2 3 command code 0x0C checksum byte 1 checksum byte 0 response format 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 result code ACK 0x06 or NAK 0x15 command code 0x0C platform ID byte 3 platform ID byte 2 platform ID byte 1 platform ID byte 0 self timed bit rate self timed channel byte 1 self timed channel byte 0 self timed interval days self timed interval hours self timed interval minutes self timed interval seconds self timed offset hours self timed offset minutes self timed of
29. ion Configuration is done through the serial interface by the user for any of the stan dard high data rate and international GOES channels See Appendix A for DCPRS Transmit Frequencies Data and programming information are input to the trans mitter over the bi directional serial port Time of day time to next transmission and diagnostic information can be read from the transmitter Electrical Characteristics Serial Interface e RS232 12V e 9600bps e data no parity 1stop bit e no flow control Operating Voltage e 10 5 to 15VDC Important Transmission are inhibited if the supply voltage is not within this specification If the voltage goes out of range while transmitting the output power is shut down and the transmission is aborted Chapter 1 Specifications Transmit Power e 10 Watts MAX 100bps and 300bps 20 Watts MAX 1200bps Current Consumptions e 3mA Quiescent 100mA during GPS fix 2 5A during 100bps or 300bps transmission 3 2A during 1200bps transmission Recommended Antenna Valcom Cross Yagi 10 dBi gain Output Frequency Range e 401 7Mhz to 402 1Mhz Machanical Module Size 22 9cm X 13 5cm X 5 1cm Module Weight 1 0Kg Operating Temperature 40 C to 50 C Front Panel Connectors RF Output TNC type socket 500 Notes Chapter 1 Specifications Serial Communication and Power 15 pin D Sub See Appendix C for the pin description
30. is sions In this example the unit is set to transmit on average every 10 minutes The window size menu item limits the duration of each transmission The trans mitter will truncate message data if necessary Random HDR transmission have fixed window sizes When the bit rate is set to 300bps or 1200bps the window window size is fixed at 3 0s or 1 5s The data repeat menu item can be used to send redundant data Data will be kept in the output buffer until it has been transmitted the specified number of times Most recent data is sent first and repeated data is automatically appended Normally data repeat is set to zero The channel menu item selects the channel See Appendix A for a list of the available channel and bit rate combinations Note International DCP channels start at 100bps channel 202 The bit rate menu item selects the bit rate The interleaver menu item allows the selection and use of an interleaver The interleaver is an optional feature of HDR GOES that enhances the system s ability to correct transmission bit errors Using the interleaver may help if messages are being corrupted by adjacent channel interference or other sources of burst RF interferences The format menu item selects the message data character set The available for mats are ascii pseudo binary and binary See Appendix B for more informa tion on each character set 10 The automatic data menu item is used to add extra information to each message
31. me This difference accumulates because UTC time is adjusted once in a while with leap seconds and GPS time is not VGOES obtains the offset from the GPS almanac so it s able to automatically adjust the time when leap seconds accur 17 03 2006 18 31 06 battery 12 0V reverse power 0 7W forward power 6 5W 17 03 2006 18 31 06 tx done next tx 18 46 02 17 03 2006 18 30 03 vedas inserted 119 bytes into self timed buffer 17 03 2006 18 30 03 select buffer done 17 03 2006 18 17 26 drift correction 0 000ms drift rate correction 3ms day 14hz 17 03 2006 18 16 33 speed up 17 03 2006 18 16 13 speed down 17 03 2006 18 16 10 battery 11 9V reverse power 0 7W forward power 6 5W 17 03 2006 18 16 10 tx done next tx 18 31 02 17 03 2006 18 16 01 terminating pre tx GPS sync 17 03 2006 18 15 04 vedas inserted 282 bytes into self timed buffer 17 03 2006 18 15 03 select buffer done 17 03 2006 18 08 35 drift correction 0 000ms drift rate correction 3ms day 14 17 03 2006 18 07 38 first sync done next tx 18 16 02 no time 00 02 29 drift correction 0 000ms drift rate correction 27ms day 1 no time 00 00 12 read status done no time 00 00 12 select buffer done no time 00 00 12 read config done no tim reset 2 17 03 2006 18 01 06 battery 12 1V reverse power 0 7W forward power 6 5W 17 03 2006 18 01 06 tx done next tx 18 16 02 17 03 2006 18 00 14 drift correction 0 043ms drift rate correction 6ms day 2
32. med at the Buyer s facility at no charge within the Valcom service travel area Limitation Of Warranty The foregoing warranty shall not apply to defects resulting from improper or inad equate maintenance by the Buyer Buyer supplied software or interfacing unautho rized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenace Customer Inquiries Inquiries regarding the VGOES HDR transmitter may be made to Valcom Manufac turing Group Inc Valcom Manufacturing Group Inc 175 Southgate Drive Guelph Ontario N1G 3M5 CANADA Telephone 519 824 3220 Fax 519 824 3411 email lt enquiries valcom guelph com gt Warranty vi Chapter 1 Specifications General The Valcom VGOES HDR is a transmitter Certified by the National Oceanic and At mospheric Administration NOAA and the National Environmental Satellite Data Information Service NESDIS for access to the Geostationary Operational Environ mental Satellite GOES system Satellite telemetry provides an efficient method of collecting environmental data from remote locations The GOES system relays messages from the data collection platforms to ground receiving stations VGOES meets or exceeds the NOAA NESDIS specification for self timed and ran dom reporting data collection platform radio sets DCPRS and may be used in any data collection system without requiring system certificat
33. nabled gt 1 2 platform id C0101034 2 3 interval 00 15 00 3 4 offset 00 01 02 4 5 window size 00 00 10 5 6 data repeat 0 6 7 channel 195 7 8 bit rate lt 300bps gt 8 9 interleaver long 9 format ascii 10 Jautomatic data 11 The enabled disabled menu item controls whether or not this type of transmis sion will be scheduled The platform id menu item is used to set the platform id for this type of trans mission This id is sent along with each transmission so the receiving station can identify the sender The interval menu item is used to set the interval between start of transmissions In this example the unit is set to transmit every 15 minutes The offset menu item is used to set the offset of the window within the inter val In this example the unit will transmit at XX 01 02 XX 16 02 XX 31 02 and XX 46 02 every hour The window size menu item limits the duration of each transmission The trans mitter will truncate message data if necessary The data repeat menu item can be used to send redundant data Data will be kept in the output buffer until it has been transmitted the specified number of times Most recent data is sent first and repeated data is automatically appended Normally data repeat is set to zero The channel menu item selects the channel See Appendix A for a list of the available channel and bit rate combinations Note International DCP channels start at 100bps channel
34. onfiguration is valid 7 8 save changes 184 80 8 1 The name menu item allows a name to be given to the configuration 2 The stop on power up menu option configures the unit to either stop or run when power is applied Normally units are set to start running on power up 3 4 5 6 7 8 Chapter 4 Programming The logger data mode option controls whether CSI insert commands append or overwrite data This option was added for extra flexibility Normally this option should be set to overwrite Enter the self timed menu to configure the unit s self timed transmissions Enter the regular random menu to configure the unit s regular random trans missions Enter the regular random menu to configure the unit s alarm random transmis sions The reload menu item can be used to revert to the configuration saved in non volatile memory This menu also shows whether the modified not saved con figuration is valid The save changes menu item is used to save the changes to non volatile memory This menu will show modified if changes have been made since the last save Once changes have been saved the menu item will show the maximum bytes per transmission given the current configuration This example shows 184 bytes per self timed transmission and 80 bytes per random transmission transmitter mode STOP v1 0 1 1 2 3 4 5 6 7 8 configuration self timed 1 lt e
35. operation A future software release will allow the transmitter to operate as a stand alone unit with SDI 12 compatible sensors connected to the SDI 12 port Please contact Valcom if you are interested in this feature LED Status Information Chapter 3 System Operation LED description solid red STOP mode flashing red failsafe tripped solid green transmitting flashing green synchronizing with GPS flashing yellow time not synchronized with GPS off RUN mode Chapter 4 Programming The VGOES serial port provides an interface to Campbell CSI compatible loggers a VGOES binary protocol and also a console menu system VGOES Binary Interface The VGOES binary interface is a simple protocol implemented on top of the Kermit File Transfer Protocol e goes HyperTerminal File Edit Call Transfer Help 1lname default 21stop on power up lt no gt start ru 31logger data mode lt overwrite gt JE Folder C vq Filename 1 d CAvgiMON UPLOAD CONFIGURATION Protocol on ao voeem lt qu vg urn vor 21configuration Connected 0 02 48 Auto detect 9600 8 N 1 The interface works by sending and receiving files with key names For example a new configuration can be uploaded by using Kermit to send a file named MON_UPLOAD_CONFIGURATION the contents of the file being a valid configuration Downloading is done in two steps Send an
36. ration Commandis sse eee eene 17 Diagnostic Commands actina ee etie toner eto loa 20 Data Transfer Commands a 24 5 Message Retrieval 27 A DCPRS Transmit Frequencies 29 B Character eue eise ec di 39 C Serial Communcation and Power Cable 43 D Antenna u eee sente aeneo tasses teens sse e I esas u sensns aod 45 E NESDIS NOAA Certification 47 iii iv Warranty Safety This product has been designed and tested according to International Safety Require ments To ensure safe operation and to keep the product safe the information cau tions and warnings in this manual must be heeded Warranty This Valcom product is warranted against defects in material and workmanship for a period of one year from date of shipment During the warranty period Valcom will at its option either repair or replace products which prove to be defective For war ranty service or repair this product must be returned to a service facility designated by Valcom However warranty service for products installed by Valcom and certain other products designated by Valcom could be perfor
37. s Frequency Mhz 100bps 300bps 1200bps international 402 028000 402 029500 220 10 402 031000 402 032500 222 11 402 034000 402 035500 224 12 402 037000 402 038500 226 13 402 040000 402 041500 228 14 402 043000 402 044500 230 15 402 046000 402 047500 232 16 402 049000 402 050500 234 17 402 052000 402 053500 236 18 402 055000 402 056500 238 19 402 058000 402 059500 240 20 402 061000 402 062500 242 21 402 064000 402 065500 244 22 402 067000 402 068500 246 23 402 070000 402 071500 248 24 402 073000 402 074500 250 25 402 076000 402 077500 252 26 402 079000 402 080500 254 27 402 082000 402 083500 256 28 402 085000 402 086500 258 29 37 Appendix A DCPRS Transmit Frequencies 38 Frequency Mhz 100bps 300bps 1200bps international 402 088000 402 089500 260 30 402 091000 402 092500 262 31 402 094000 402 095500 264 32 402 097000 402 098500 266 33 Appendix B Character Sets Table B 1 ASCII Character Set Isb 0 00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x0 NUL XDLE SPACE 0 P i p 0x1 XSOH DC1 1 A Q a q 0x2 XSTX DC2 2
38. s minutes and seconds in the form HHMMSS This is a time stamp applied when the message is received Note the system rounds up 5 Failure code G good message message received with parity errors W message received on wrong channel D message received on multiple channels duplicate A message received with address error s correctable 27 Chapter 5 Message Retrieval Notes 28 6 Signal strength in dB 32 to 57 7 Offset from center frequency 0 to 9 in increments of 50Hz or A for 500Hz 8 Modulation index N normal 60 degrees L low lt 50 degrees H low gt 70 degrees These codes are not defined for High Data Rate messages Note it is normal to see H or L for short HDR messages 9 Data quality N normal 85 or more of the bits were good F fair 70 to 85 of the bits were good P poor lt 70 of the bits were good 10 Channel Note 1200bps transmissions show the closest lower 100bps 300bps channel number See Appendix A For example 1200bps channel 99 will be shown as channel 197 11 GOES spacecraft E GOES East W GOES West 12 This field no longer has a meaning 13 The number of message bytes to follow 14 This field is not included for 100bps Low Data Rate transmissions bit 0 unused always clear bit 1 clock updated set if time has been synchronized with GPS bit 2 unused always clear bit 3 unused always clear bit 4 unused always clear bit
39. t appended to whatever is currently in the buffer MON RANDOM BUFFER Send this file key to write data to the random transmit buffer The contents of the file will overwrite whatever is currently in the buffer MON RANDOM BUFFER PRE APPEND Send this file key to write data to the random transmit buffer The contents of the file will be pre appended to whatever is currently in the buffer MON RANDOM BUFFER POST APPEND Send this file key to write data to the self timed transmit buffer The contents of the file will be post appended to whatever is currently in the buffer MON TRIGGER ALARM Send this file key to put the transmitter in alarm mode The transmitter will schedule random transmissions if the profile is enable MON CANCEL ALARM Send this file key to stop random alarm transmissions from being scheduled MON UPLOAD FIRMWARE Send this file key to upgrade the firmware The content for file will be supplied by Valcom when upgrades are issued MON UPLOAD CONFIGURATION Send this file key to upload a configuration file See the Section called Configuration File Format for a description of the format Chapter 4 Programming Configuration File Format The configuration file is an image of the following C structure typedef struct configuration_struct char config_format_version char config_name 20 char config_version 20 long long config_date char checksum short max_random_file size short max self timed file si
40. x D Antenna Orientation This computer program calculates the direction of the GOES satellite relative to an an tenna s longitude and latitude The maximum gain for the GOES antenna is straight ahead with a perfect ground plane but in typical installations the radiation pattern will give the highest gain at about 6 degrees higher So you ll find the best reception is achieved by pointing the antenna 6 degrees below the satellite define earth radius 6378 km define goes altitude 35785 km define goes latitude 0 over the equator define goes east longitude 75 western hemispher define goes west longitude 135 western hemispher define pi 3 14159265358979323846 define deg gt rad theta x theta pi 180 defin rad gt deg theta theta 180 pi rho earth radius altitude 1 phi 90 latitude 3 theta longitude x 0 y 0 z 0 is center of the Earth define cartesian gt spherical x y z letx rho sqrt expt x 2 expt y 2 expt z 2 S sqrt expt x 2 expt y 2 phi rad gt deg acos z rho theta rad gt deg if x 0 pi asin y S asin y S list rho phi theta defin spherical gt cartesian rho phi theta let x rho sin deg gt rad phi cos deg gt rad theta y rho sin deg rad phi sin deg gt rad theta z rho cos deg gt rad phi list x y z define
41. ze unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned unsigned int in logger data mode 3 stop on power up 1 char extra pad 4 in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in e eT Gt CE CE CE 427 seer ICT Gb CE e AIGE ICE CF Cy 55272202 ICE ich CT 501 TENCE e Gh o er CE ICE ch AT seh CE CEE Ct random_regular_enabled 1 random_regular_platform_id 32 random_regular_interval 17 random_regular_window_size 17 random_regular_repeat_count 4 random_regular_channel 9 random_regular_bit_rate 2 random_regular_interleaver 2 random_regular_format 2 random_regular_append_count 1 random_regular_append_v 1 random_regular_append_forward_power 1 random regular append reverse power 1 random regular append file age 1 random regular append file size 1
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