スペースシャトル STS-116 and ANDE/RAFT
● (No.508) スペースシャトル STS-116 and ANDE/RAFT (2003年12月10日)
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スペースシャトル STS-116 ディスカバリーは、日本時間 12月10日午前10時47分
に打ち上げられました。
http://www.nasa.gov/mission_pages/shuttle/main/index.html
この STS-116 と一緒に打ち上げられ、放出される予定の衛星 ANDE と RAFT の
テレメトリフォーマットを以下に掲載します。
ANDE Side A: 145.825 Digipeater up/downlink 1200 baud packet
ANDE Side B: 145.825 downlink (backup to side A only)
RAFT System: 145.825 Digipeater up/downlink 1200 baud packet
RAFT PSK-31: 28.120 HF PSK-31 uplink -downlink on 145.825
http://web.usna.navy.mil/~bruninga/satstation.html
http://www.ew.usna.edu/~bruninga/ande-raft-ops.html
http://www.amsat.org/amsat/ftp/news/2006/ans337.txt
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The 20 channels of ANDE telemetry are multiplexed into 4 sequential
frames. Each frame consists of 5 analog channels, and 8 status
bits which include the two FRAME counter bits. It takes 4 frames
to constitute the complete telemetry picture of ANDE. Frame Format:
ANDE>APRTLM,SGATE:T#SSS,111,222,333,444,555,FF111111
Where the header is ANDE>APRTLM,SGATE: (These fields may vary)
Within the actual data portion of the packet are these fields:
SSS is the serial number
111 is the first channel telemetry
222 is the second channel
333 is the third channel
444 is the forth channel
555 is the fifth channel
FF111111 the 8 internal bits (including the FRAME counter)
FF CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 CHANNEL 5
-- ----------- ---------- ---------- ---------- ----------
11 BUS-Volts SOLAR-X SOLAR-Y SOLAR-Z 5V BUS
10 Temp-BAT Temp-SOL-X Temp-SOL-Y Temp-SOL-Z Temp-Retro
01 Laser-Volts A1-Amps A2-Amps B1-Amps B2-Amps
00 Temp-Bat-B Clock Temp-Laser Time-to-Go On-Time
Telemetry equations are generally of the form y = aX + b
where X is the 3 byte decimal telemetry count in each channel
in the data. Temperature is a cubic y=aX^3 + bX^2 + cX - d.
Define Function for Temperature:
Tof(V) = .00001 * X ^ 3 - .0039 * X ^ 2 + .829 * X - 40.4
IF Frame is "00" THEN
Temp-Bat-B = TempOf(X1)
Clock = X2 * 1
Temp-Laser = TempOf(X3)
Time-to-Go = X4 * 1
On-Time = X5 * 1
IF Frame is "01" THEN
Laser Volts = X1 * 0.1
A1-Amps = X2 * 1.7 - 4
A2-Amps = X3 * 1.7 - 4
B1-Amps = X4 * 1.7 - 4
B2-Amps = X5 * 1.7 - 4
IF Frame is "10" THEN
Temp-Bat-A = TempOf(X1)
Temp-SOL-X = TempOf(X2)
Temp-SOL-Y = TempOf(X3)
Temp-SOL-Z = TempOf(X4)
Temp-Retro = TempOf(X5)
IF Frame is "11" THEN
BUS-volts = X1 * 0.1
SOL-X = X2 * -.0196 + 1
SOL-Y = X3 * -.0196 + 1
SOL-Z = X4 * -.0196 + 1
5-volt-ref = X5 * .0235
http://www.ew.usna.edu/~bruninga/ande.html
http://www.dk3wn.info/sat/afu/sat_ande.shtml
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RAFT1>APRS,SGATE:T#nnn,CH1,CH2,CH3,CH4,CH5,xxxxxxxx
RAFT1 AX.25 callsign of RAFT1
APRS AX.25 generic TOCALL
SGATE digipeater address for Internet Gateways
T#nnn a 3 decimal digit serial number
CH1 to CH5 5 telemetry channels (3 digit decimal)
xxxxxxxx an 8 byte (8 bit binary) number showing the state of
the output bits
The telemetry channels will be presented in standard format as shown below:
FRAME 00: CH1 - Battery Voltage
CH2 - Temperature
CH3 - X arrays solar current
CH4 - Y arrays solar current
CH5 - Z arrays Solar current
http://web.ew.usna.edu/~raft/index.htm
http://www.ew.usna.edu/~bruninga/raft.html
http://www.dk3wn.info/sat/afu/sat_raft.shtml
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RAFT and ANDE の放出日は、12月20日 であることがわかりました。
Shuttle Mission TV Schedule の HP の View PDF をクリックすると、分刻みの
スケジュールが組まれていることがわかります。乗組員の多忙さが理解できます。
RAFT DEPLOY: 20 Dec, 00:05 UTC
ANDE DEPLOY: 20 Dec, 19:42 UTC
http://iss.sfo.jaxa.jp/iss/12a.1/mission/schedule.html
http://www.nasa.gov/multimedia/nasatv/mission_schedule.html
RAFT and ANDE の初期軌道要素が、早朝(12/11)、USNA Satellite Lab, WB4APR,
Bob Bruninga氏により公開されました。MEPSI はアマチュア衛星ではありません。
RAFT
1 99996U 06055B 06354.00425926 .00000000 00000-0 75127-6 0 05
2 99996 51.6317 309.4879 0022786 355.5701 331.0310 15.79983089 08
ANDE
1 99997U 06055C 06354.82113426 .00000000 00000-0 80952-6 0 07
2 99997 51.6301 305.2569 0023271 358.3253 297.8304 15.80009479 01
MEPSI
1 99998U 06055D 06353.92692130 .00000000 00000-0 87344-6 0 04
2 99998 51.6299 309.8896 0022956 355.6419 250.7656 15.80006930 01
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RAFT and ANDE の他に、NMARS and FCAL の 2個、合計 4個のキューブサット
が、US Naval Academy Student Projects の一環として放出されます。
http://www.ew.usna.edu/~bruninga/ande-raft-ops.html
NMARS:
VHF 148 MHz FM uplink
HF SSB downlink 27.962 USB reception capability and a 10m beam
A 1200 baud packet TNC to RX on 10m and TX on 148 MHz.
http://www.ew.usna.edu/~bruninga/marscom.html
FCAL:
THe frequency for FCAL is in the 435 band. We will post it when we get it.
The images below detail how the telemetry from FCAL can be decoded.
http://www.ew.usna.edu/~bruninga/fcal.html
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