Pico-satellite for Remote-sensing and Innovative Space Missions, The University of Tokyo
Am 23.01.2009 um 03:54 UTC startete eine H-IIA F15 Rakete vom Tanegashima Space Center in Japan. Hauptnutzulast war GOSAT (Ibuki), der weltweit erste Satellit, der den Klimawandel untersuchen soll. Als Piggiback Payload waren noch 6 weitere Satelliten an Bord. Um 04:43 UTC wurde PRISM als letzter Satellit separiert.
NASA-Catalog: 33493
Downlink
437.425 MHz, FM 1k2 AFSK (800mW), 9k6 GMSK (2W)
Bake
437.250 MHz, CW (80mW)
Call
JQ1YZW
Status
ACTIVE
Orbital Parameter
Name PRISM NORAD #33493 COSPAR Bezeichnung 2009-002-B Inklination (Grad) 98.046 RAAN 147.181 Excentrizität 0.0019427 ARGP 313.924 Umläufe pro Tag 14.80607306 Periode 1h 37m 15s (97.25 Min) Semi-major axis 7006 km Perigäum x Apogäum 614 x 641 km Mean Anomaly 46.037
CW Telemetrie
CW ist der Standardmode von PRISM, der Packet-Downlink wird nur im Bereich der Kommandostation in Japan aktiv sein. Die CW Telemetrie besteht aus insgesamt 14 Frames. Hier die Übersicht:
Frame 0
PR0 AA BB CC DD EE FF GG HH AA fixed value BB CDH subsystem voltage A 4.69*N/255 [V] CC mission subsystem voltage 4.69*N/255 * 1.667 [V] DD power subsystem voltage 4.69*N/255 * 1.667 [V] EE CDH subsystem voltage B 4.69*N/255 * 1.667 [V] FF TX subsystem voltage 4.69*N/255 * 1.667 [V] GG Main RX subsystem voltage 4.69*N/255 * 1.667 [V] HH Sub RX subsystem voltage 4.69*N/255 * 1.667 [V]
Frame 1
PR1 AA BB CC DD EE FF GG HH AA fixed value BB magnetic torquer supply voltage 4.69*N/255 [V] CC AFSK radio supply voltage 4.69*N/255 * 1.667 [V] DD GMSK radio supply voltage 4.69*N/255 * 2.5 [V] EE solar cell output voltage 4.69*N/255 * 2.5 [V] FF Battery voltage 4.69*N/255 * 2.5 [V] GG Charging current 4.69*N/255 * 666.67 [mA] HH Discharging current 4.69*N/255 * 666.67 [mA]
Frame 2
PR2 AA BB CC DD EE FF GG HH AA fixed value BB solar cell output current +X 4.69*N/255 * 227.27 [mA] CC solar cell output current -X 4.69*N/255 * 227.27 [mA] DD solar cell output current +Y 4.69*N/255 * 227.27 [mA] EE solar cell output current -Y 4.69*N/255 * 227.27 [mA] FF solar cell output current +X rev 4.69*N/255 * 106.38 [mA] GG solar cell output current -X rev 4.69*N/255 * 106.38 [mA] HH solar cell output current +Y rev 4.69*N/255 * 106.38 [mA]
Frame 3
PR3 AA BB CC DD EE FF GG HH AA fixed value BB solar cell output current -Y rev 4.69*N/255 * 106.38 [mA] CC solar cell output current +X body 4.69*N/255 * 106.38 [mA] DD solar cell output current -X body 4.69*N/255 * 106.38 [mA] EE solar cell output current +Y body 4.69*N/255 * 106.38 [mA] FF solar cell output current -Y body 4.69*N/255 * 106.38 [mA] GG CDH subsystem supply current A 4.69*N/255 * 333.33 [mA] HH mission subsystem supply current 4.69*N/255 * 227.27 [mA]
Frame 4
PR4 AA BB CC DD EE FF GG HH AA fixed value BB power subsystem supply current 4.69*N/255 * 33.33 [mA] CC CDH subsystem supply current B 4.69*N/255 * 22.73 [mA] DD TX subsystem supply current 4.69*N/255 * 33.33 [mA] EE Main RX subsystem supply current 4.69*N/255 * 22.73 [mA] FF Sub RX subsystem supply current 4.69*N/255 * 22.73 [mA] GG AFSK radio supply current 4.69*N/255 * 333.33 [mA] HH GMSK radio supply current 4.69*N/255 * 666.67 [mA]
Frame 5
PR5 AA BB CC DD EE FF GG HH AA fixed value BB sensor system supply current 4.69*N/255 * 50.0 [mA] CC heater supply current 4.69*N/255 * 227.27 [mA] DD Deployment system supply current 4.69*N/255 * 666.67 [mA] EE Gyroscope X (4.69*N/255 -2.5) / -0.025 [deg/s] FF Gyroscope Y (4.69*N/255 -2.5) / -0.025 [deg/s] GG Gyroscope Z (4.69*N/255 -2.5) / -0.025 [deg/s] HH not used
Frame 6
PR6 AA BB CC DD EE FF GG HH AA fixed value BB Temperature +X side -87.5 * 4.69*N/255 + 162.5 [°C] CC Temperature -X side -87.5 * 4.69*N/255 + 162.5 [°C] DD Temperature +Y side -87.5 * 4.69*N/255 + 162.5 [°C] EE Temperature +Y side -87.5 * 4.69*N/255 + 162.5 [°C] FF Temperature +Z side -87.5 * 4.69*N/255 + 162.5 [°C] GG Temperature -Z side -87.5 * 4.69*N/255 + 162.5 [°C] HH fixed value
Frame 7
PR7 AA BB CC DD EE FF GG HH AA fixed value BB Temperature +X panel -87.5 * 4.69*N/255 + 162.5 [°C] CC Temperature -X panel -87.5 * 4.69*N/255 + 162.5 [°C] DD Temperature +Y panel -87.5 * 4.69*N/255 + 162.5 [°C] EE Temperature +Y panel -87.5 * 4.69*N/255 + 162.5 [°C] FF Temperature +Z panel -87.5 * 4.69*N/255 + 162.5 [°C] GG Temperature -Z panel -87.5 * 4.69*N/255 + 162.5 [°C] HH fixed value
Frame 8
PR8 An Bn Cn Dn En Fn Gn Hn In Jn Kn Ln
An power switchiung history of CDH subsystem A Origin n times
Bn power switching history of mission subsystem B Origin n times
Cn power switching history of CDH subsystem B Origin n times
Dn power switching history of TX subsystem Origin n times
En power switching history of Main RX subsystem Origin n times
Fn power switching history of Sub RX subsystem Origin n times
Gn power switching history of AFSK radio Origin n times
Hn power switching history of Magnetic Torquer Origin n times
In power switching history of GMSK radio Origin n times
Jn power switching history of Sensor system Origin n times
Kn power switching history of Heater system Origin n times
Ln power switching history of Deployment system Origin n times
Origin: 0 none
1 uplink command (number of times n = 0)
2 over cuurent (judge from AD conversion data)
3 over voltage (judge from AD conversion data)
4 over cuurent (by over current protection circuit)
5 mutal monitoring
6 regulation
7 switching times exceeded a certain limit
Frame 9
PR8 AA BB CC DD EE FF GG HH II JJ KK LL MM NN OO PP AA switching status of CDH subsystem A BB switching status of mission substem CC switching status of CDH subsystem B DD switching status of TX substem EE switching status of Main RX subsystem FF switching status of Sub RX subsystem GG switching status of AFSK radio HH switching status of Magnetic Torquer II switching status of GMSK radio JJ switching status of Sensor system KK switching status of Heater system LL switching status of Deployment system MM switching status of overcurrent protection circuit of GMSK NN switching status of overcurrent protection circuit of CDH OO switching status of Battery charge PP switching status of emergency battery value: 3F = OFF 40 = ON
Frame 10
PRA AA BB CC DD EE
AABBCCDD time ticks from power subsystem rebooting counts [sec]
EE operation mode
53 = SAFE
4E = NORMAL
52 = RESET
Frame 11
PRB AA BB CC DD EE FF GG HH II AA last error log pointer to error log number #, 0 = no error BB error log #1 see error table CC error log #2 see error table DD error log #3 see error table EE error log #4 see error table FF error log #5 see error table GG error log #6 see error table HH error log #7 see error table II error log #8 see error table error table: 01 = timeout of AD conversion 02 = AD conversion did not finish 10 = switching times of CDH subsystem voltage A exceeded the limit 12 = switching times of CDH subsystem voltage B exceeded the limit 13 = switching times of TX exceeded the limit 14 = switching times of Main RX exceeded the limit 15 = switching times of Sub RX exceeded the limit 16 = switching times of AFSK radio exceeded the limit 19 = switching times of Sensor system exceeded the limit 1E = Charging current (or voltage) error 1F = Battery voltage error 20 = CAN Error -> data overrun error 21 = CAN Error -> error counter over or bus status change 30 = CAN Error -> received invalid message 31 = received invalid command 40 = no reply 41 = rely invalid 42 = operation competing of some commands 50 = serial communication error (Main RX) 51 = serial communication error (Debug)
Frame 12
PRC //WWW.SPACE.T.U-TOKYO.AC.JP
Frame 13
PRD {message from ISSL members}
Status
CW Bake aktiv
Erste empfangene Telemetrie
23.01.2009, 1027 UTC (2 degr pass) prc --www.space.t.u-tokyo.ac.jp prd -soranokonosorawoomougagotoki pr0 .....4a5a421a4a4 pr1 0000a51dfbb91000 pr2 000410110d00000. 23.01.2009, 1341 UTC pr2 00 01 10 0d 0c 00 00 00 pr3 00 08 00 00 00 8b 00 02 pr4 00 37 6d 00 30 2a 05 00 pr5 00 5c 00 00 87 87 8b 75 pr6 00 5e 5e 65 56 61 67 00 pr7 00 72 74 73 6e 63 62 00 pr8 00 00 00 00 00 00 00 00 00 00 00 00 pr9 3f 3f 40 3f 40 40 .. .. 23.01.2009, 1510 UTC pr5 00 59 00 00 89 8b 8c 75 pr6 00 5e 68 5a 64 65 69 00 pr7 01 7d 78 77 7e 63 63 00 pr8 00 00 00 00 00 00 00 00 00 00 00 00
Software zum Dekodieren der CW-Telemetrie
PRISM sendet CW Telemetrie in 14 unterschiedlichen Frames. Der empfangene String (beginnend jeweils mit dem Frametyp PRx) wird in das entsprechende Textfeld eingegeben. Alle Telemetriedaten werden berechnet und übersichtlich angezeigt. Auch das Einlesen eines ASCII Files mit den entsprechenden Daten ist möglich. Die ausgewertete Telemetrie kann in einem ASCII File abgespeichert werden.
Download Version 1.0 [27.01.2009]
Links und weitere Informationen
http://www.space.t.u-tokyo.ac.jp/prism/main-e.htmlhttp://www.jaxa.jp/countdown/f15/overview/sub_payload_e.html
Launch
