明日(12/10) STS-116 と一緒に打ち上げられ、放出される予定の
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ANDE のテレメトリフォーマットです。
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