
Der israelische Amateurfunksatellit TECHSAT 1B (GO-32) wurde zusammen mit TO-31 am 10.07.1998 vom Baikonur Cosmodrome in Kazakhstan gestartet. Die Inklination des Satelliten beträgt ca. 98° auf einer sonnensynchronen polaren Umlaufbahn in einer durchschnittlichen Höhe von 820km und einer Umlaufzeit von 101 Minuten. Die Sendeleistung beträgt 1 Watt (3 Watt optional).

Downlink
435.325 MHz (FM 9k6 FSK AX.25)
435.225 MHz (FM 9k6 FSK AX.25)
Calls
Bake: 4XTECH-11
BBS: 4XTECH-12
Uplink
145.850, 145.890 und 145.930 MHz (FM 9k6 FSK AX.25)
1269.700, 1269.800 und 1269.900 MHz
Status
nur noch SAFE Mode Bake aktiv
Orbital Parameter
Name GO-32 NORAD 25397 COSPAR Bezeichnung 1998-043-D Inklination (Grad) 98.398 RAAN 341.396 Excentrizität 0.0000860 ARGP 157.524 Umläufe pro Tag 14.23133006 Periode 1h 41m 11s (101.18 Min) Semi-major axis 7193 km Perigäum x Apogäum 814 x 815 km Bstar (drag Faktor) 0.000044703 1/ER Mean Anomaly 202.596
Das GO-32 Telemetriesystem
Es gibt verschiedene Telemetrietypen :
- Beacon
- Events Telemetry – Telemetry Buffer 0
- Important parameters telemetry – Telemetry Buffer 1

Die Telemetrie Buffer 0 und 1 enthalten Parameter, die über den gesamten Orbit hinweg gesammelt wurden. Sie werden ausschliesslich auf Anforderung gesendet. Das DOS-Programm zur Kommunikation mit dem Satelliten, insbesondere zur Anforderung von Telemetriedaten, konnte bisher noch von der Techsat-Homepage geladen werden. Wer Interesse hat, kann es auch von mir bekommen.
Uplinkfrequenz ist derzeit 145.850 MHz, Downlinkfrequenz 435,225 MHz.
1. Allgemeine Telemetriebake (aller 30sek) : UI Frame im AX.25 KISS Format
Bsp: kompletter Frame:
C0 00 0A 0B 15 00 8C 01 62 D2 A2 39 54 65 63 68 53 61 74 2D 56 38 2E 35 00 44 10 00 00 00 E5 25 10 00 40 10 05 00 00 00 00 00 8C 0D 02 00 C0
Zerlegt man den Frame in die einzelnen Bytes :
C0 00 0A 0B Beginn und Header des KISS-Frames 15 00 Size $15 = 21 Words = 42 Bytes 8C 01 Key 8C 01 140 = Beacon 64 xx 100 = Telemtrieblöcke mit xx lfd. Nr. 96 01 150 = ? 78 00 120 = ? 62 D2 A2 39 $39A2D262 Unix TimeStamp = 22.08.2000 19:20:02 UTC 39 54 65 63 68 53 61 74 2D 56 38 2E 35 ASCII Header = Techsat-V.6 00 44 0000.0000 0100.0100 Statusflags[1] 10 00 0001.0000 0000.0000 Statusflags[2] 00 00 choosen RAM/4 + 1 (RAM-Bank 1) E5 25 DS Value (Datensegment) 10 00 PIC Vector (Master PIC Vector) 40 10 CS Value (Beginn des Codesegment) 05 00 Attidude State 00 00 Power State 00 00 Power Current 8C 0D Power VBatt 02 00 Power AH Counter C0 Ende Flag des KISS Frames
2. Telemetry Buffer 1 (auf Anforderung) : UI Frame im AX.25 KISS Format
Channel Type Parameter Name Desciption ------------------------------------------------------------------------------------- 2001 MEM_W PCU_BAT_V Battery Voltage sampled by PCU 2004 MEM_W PCU_CHRG_I Charge Current from Solar Panels 2005 MEM_W PCU_DISCHRG_I DisCharge Current sampled by PCU 2008 MEM_BB AH_COUNTER A/H Counter which reflect Batter Satatus 2007 MEM_W REG_BUS_5V Regulated 5V Supply 2200 MEM_WB PDU_STATUS PDU Units Switch On/Off status 2020 MEM_W I_ENERCON1 Current from Power-Supply 1 2021 MEM_W I_ENERCON2 Current from Power-Supply 2 2046 MEM_W I_UNREG_12V Not Regulated Current from 12V Supply 2201 MEM_I POWER_STATE Logic State of Power System 2151 MEM_L TOTAL_CHARGE Accomulated Total Charge 2152 MEM_L MAX_CHARGE 1200 STRUCT1 COMM_STATISTIC Satellite Communication Statistics 81 MEM_I W_WHEEL Momentum-Wheel Speed 56 MEM_I ATT_LOGIC_STATE Logic State of Attitud System 66 MEM_L ATT_STATE_TIME Time Period in Seconds of Attitud State 2092 MEM_W T_SOP_X+ Temprature of Solar Panel X+ 2097 MEM_W T_SOP_X- Temprature of Solar Panel X- 2102 MEM_W T_SOP_Y+ Temprature of Solar Panel Y+ 2107 MEM_W T_SOP_Y- Temprature of Solar Panel Y- 2112 MEM_W T_ANT_PAN Temprature of Antena's Panel 2117 MEM_W T_COLD_PAN Temprature of Cold Panel 2125 MEM_W T_BATTERY Temprature of Battery 2500 MEM_L CYCLE_OVFLOW Cycle OverFlow Counter in Satellite 2501 MEM_L EDC_SINGLE EDC-Single Errors Counter in Satellite 2502 MEM_L EDC_MULTI EDC-Multi Errors Counter in Satellite 2503 MEM_L FP_MATH_ERRORS Floating Point Math errors counter
Beispiel Telemetry Buffer 1:
16:45:47 PCU_BAT_V 13.204 16:45:35 W_WHEEL -9.499 16:45:47 PCU_CHRG_I 0.040 16:41:53 T_SOP_Xp_CNTR -29.986 16:45:47 PCU_DISCHRG_I 0.036 16:41:53 T_SOP_Xm_CNTR -23.272 16:35:38 REG_BUS_5V 4.995 16:41:53 T_SOP_Ym_CNTR -29.986 16:35:43 I_ENERCON1 2.106 16:41:53 T_SOP_Zm_CNTR -24.493 16:35:43 I_ENERCON2 -0.126 16:41:55 T_ANT_PAN -16.314 16:35:51 I_UNREG_12V 1.121 16:41:55 T_COLD_PAN -22.418 16:35:29 TOTAL_CHARGE -1.014 16:41:56 T_TRANS -11.309 16:35:29 MAX_CHARGE 0.416 16:41:56 T_BATTERY -3.619 16:30:01 AH_COUNTER 0000.1010. 16:35:29 PDU_STATUS 0000.0000.0111.1011. 16:41:58 ATT_LOGIC_STATE 00008 16:35:29 POWER_STATE 00000 16:41:58 ATT_STATE_TIME 287169 16:35:29 COMM_STATISTIC: 16:30:21 CYCLE_OVFLOW 523933 CRC Errors 816529 16:19:05 EDC_SINGLE 37 Dnlink Frames 200123 16:19:07 EDC_MULTI 0 Uplink Frames 21775
3. Telemetry Buffer 0 (auf Anforderung) : UI Frame im AX.25 KISS Format
Channel Type Parameter Name Desciption ---------------------------------------------------------------------------------- 1800 STRUCT2 ATT_NEW_STATE Change in Attitud State Status 1801 STRUCT3 HS_ERROR Error Code from Horizon-Sensor Driver 1802 MEM_I MAGMETER_ID_ERR MagnetoMeter ID Error Occured 1803 MEM_WB MOM_WHEEL_ERR Momentum-Wheel Error Occured 1804 STRUCT6 COMM_BSIZE_ERR Block Size Error in Comm. with Sat. 1805 STRUCT7 NOT_VALID_GS Sat. recieved not Valid GS Frames 1806 STRUCT8 SCC_TEST_FAIL Error in SCC BIT 1807 MEM_0 DAC_FAIL 1808 MEM_0 FULL_UPLINK Uplink Queue was Full 1809 MEM_0 FULL_DOWNLINK DoenLink Queue was Full 1810 STRUCT10 UPLINK_HOLE Uplink Comm. Hole Occured 1811 MEM_I POWER_HAZDIS Power Hazard Failure Occured 1812 STRUCT11 POWER_CRUSH Power Crush Occured 1813 MEM_I MODEM_FREEZE Modem Freeze Failure 1814 MEM_I MODEM_FAIL Modem Failed 1815 STRUCT12 TRANS_5VHIGH Transmitter 5V Current is High 1816 STRUCT12 TRANS_12VHIGH Transmitter 12V Current is High 1817 MEM_I MATH_ERROR Floating Point Error Occured 1818 MEM_0 WD_OCCURED Watch-Dog Reset Occured 1819 MEM_0 NO_COMMUNICATION No Uplink Communication 1820 MEM_I TRANS_NEVER_FREE Transmitter never free 1840 MEM_I EXPERIMENT error 1842 MEM_I CAMERA EXPER. error
Payload System

X-Ray Detector, Ozone-Detector, Charced Particles Detector, Superconductivity Experiment, Laser Retroreflector.
Zur Payload gehört auch das Earth Imaging System. Die CCD-Kamera liefert Farbfotos mit einer Auflösung von 60m/Pixel. Das entspricht einem Bildinhalt von 25 x 31 km. Die Lichtempfindlichkeit beträgt 0,5 lux.
Eines der ersten Bilder von GO-32 zeigt die Südküste von Frankreich (Saint-Tropez Region)
BBS Status

Die BBS von GO-32 ist für den Amateurfunkbetrieb freigegeben. Der Status wechselt allerdings recht oft.
fm 4XTECH-11 to PBLIST ctl UI pid F0 PB: Empty. fm 4XTECH-12 to BBSTAT ctl UI pid F0 BroadCAST : fm 4XTECH-12 to STATUS ctl UI pid F0 GMT: Sun Jul 28 11:03:12 2002 | hello from Gurwin Techsat1B (V9.2) fm 4XTECH-11 to DK3WN ctl UI pid BB OK DK3WN fm 4XTECH-11 to PBLIST ctl UI pid F0 PB: DK3WN\D fm 4XTECH-12 to BBSTAT ctl UI pid F0 fm 4XTECH-11 to PBLIST ctl UI pid F0 PB: DK3WN\D fm 4XTECH-12 to STATUS ctl UI pid F0 GMT: Sun Jul 28 11:04:13 2002 | hello from Gurwin Techsat1B (V9.2)
fm 4XTECH-12 to BBSTAT ctl UI pid F0 Open:AB1C23: fm 4XTECH-12 to STATUS ctl UI pid F0 B:73690346 fm 4XTECH-12 to STATUS ctl UI pid F0 UTC: Sun Jul 11 20:22:48 2004 | Gurwin Techsat1B (V9.83) fm 4XTECH-12 to STATUS ctl UI pid F0 Happy 6th year Birthday to Gurwin Techsat1b. fm 4XTECH-12 to STATUS ctl UI pid F0 BBS Mode:1 Upload User/5 Broadcasts , Uplink freq:145.890,145.850 fm 4XTECH-12 to STATUS ctl UI pid F0 Happy 6th year Birthday to Gurwin Techsat1b. fm 4XTECH-12 to STATUS ctl UI pid F0 be well on your 7th fm 4XTECH-12 to STATUS ctl UI pid F0 fm 4XTECH-12 to BBSTAT ctl UI pid F0 Open:AB1C23: fm 4XTECH-11 to PBLIST ctl UI pid F0 PB: Empty.
dekodierte Frames vom 11.07.2004, 2020 UTC
> fm 4XTECH-12 to STATUS ctl UI pid F0 > UTC: Mon Mar 21 00:05:50 2005 | Gurwin Techsat1B (V9.86) > > fm 4XTECH-12 to STATUS ctl UI pid F0 > BBS is active again in trial version !!! . > > fm 4XTECH-12 to STATUS ctl UI pid F0 > 2 Users/8 Broadcasts , Uplink freq:145.890,145.850,145.930, > 1269.800, 1269.900
dekodierte Frames vom 21.03.2005
4XTECH-11>PB: Empty. 4XTECH-12>Open:AB1C23: 4XTECH-12>B:24599263 4XTECH-12>UTC: Sat Feb 04 09:37:26 2006 | Gurwin Techsat1B (V9.86) 4XTECH-12>BBS(9.86) is active ,AsherSpaceResearchInst greets you. 4XTECH-12>2 Users/8 Broadcasts , Uplink freq:145.890,145.850,145.930, 1269.800, 1269.900
dekodierte Frames vom 04.02.2006, 0933UTC
APRS über GO-32
Downlink: 435.225 MHz, FSK, 9k6
Uplink: 145.850 MHz, FSK, 9k6 [normale APRS Stationen]
Uplink: 145.900 MHz, FSK, 9k6 [Kenwood D7x, D700]


Setup UIView32: PATH APRS VIA 4XTECH
fm 4XTECH-12 to STATUS ctl UIv pid F0 >B:410339 fm 4XTECH-11 to PBLIST ctl UIv pid F0 PB: Empty. fm DK3WN-1 to APU25N via 4XTECH* ctl UI^ pid F0 =4943.90N/00857.30EyGO-32 APRS Test - see www.dk3wn.info fm 4XTECH-12 to BBSTAT ctl UIv pid F0 Open:AB1C23: fm 4XTECH-12 to STATUS ctl UIv pid F0 >B:410416 fm 4XTECH-11 to PBLIST ctl UIv pid F0 PB: Empty. fm 4XTECH-12 to BBSTAT ctl UIv pid F0 Open:AB1C23: fm 4XTECH-12 to STATUS ctl UIv pid F0 >B:410618 fm 4XTECH-11 to PBLIST ctl UIv pid F0 PB: Empty. fm 4XTECH-12 to BBSTAT ctl UIv pid F0 Open:AB1C23: fm 4XTECH-12 to STATUS ctl UIv pid F0 >B:410695 fm 4XTECH-12 to BEACON ctl UIv pid F0 >Fri Oct 12 19:10:45 2007 :UTC| Gurwin Techsat1B (V9.87) fm 4XTECH-12 to BEACON ctl UIv pid F0 BBS(V9.87 beta) 2Users/8BCasts. fm 4XTECH-12 to BEACON ctl UIv pid F0 Upl:145.89,145.93,1269.8,1269.9 fm 4XTECH-12 to BEACON ctl UIv pid F0 :BLN1 GO32:su APRS!!Use pth via 4XTECH fm 4XTECH-12 to BEACON ctl UIv pid F0 :BLN2 GO32:APRS msgs and clients use 145.85 Upl fm 4XTECH-12 to BEACON ctl UIv pid F0 :BLN3 GO32:D7&D700 posits use 145.9s fm DK3WN-1 to APU25N via 4XTECH* ctl UI^ pid F0 =4943.90N/00857.30EyGO-32 APRS Test - see www.dk3wn.info fm 4XTECH-11 to PBLIST ctl UIv pid F0 PB: Empty.
Frames vom 12.10.2007, 1910UTC
Software zur Decodierung der Telemetriebake


Zur Dekodierung der Telemetriebake habe ich ein kleines Programm geschrieben. Es konvertiert aus einem KISS File und stellt sie übersichtlich dar. Man kann die ausgewerteten Daten auch in einem ASCII File abspeichern (filename.txt).
Weitere Informationen
Tidhar Teucher, 4Z5CA, hat die Techsat-Internetseite http://www.iarc.org/techsat/techsat.html beim IARC geupdatet und wird sich bemühen, über Änderungen und den Fortschritt bei GO-32 zu informieren.
Technische Details findet man auch hier : http://www.technion.ac.il/ASRI/techsat/index.htm