GURWIN OSCAR (GO-32) - Amateur Radio

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