karn (05/09/83)
The following is a recent set of telemetry decoding formulas for the
UoSAT-OSCAR-9 satellite, courtesy of the UoSAT group at the University
of Surrey, England.
Telemetry sensor allocation:
--------------------------- update: 26 Apr 1983
Channel Parameter Cal. Equation
******* ********* *************
00 Secondary S/C computer (F100L) 1.2N mA (0.125A <I< 1A)
01 Solar array current +X 200 + 1.12N mA
02 Battery half voltage N/100 *(1.01)
03 Radiation detector A O/P 40N *(1.04) Counts/S
04 Radiation detector B O/P 40N *(1.04) Counts/S
05 Magnetometer expt. HY-coarse INT(Nyc/63.5+0.689)*8054-Fy
06 Magnetometer expt. HX-coarse INT(Nxc/63.5+0.689)*8103-Fx
07 Magnetometer expt. HZ-coarse -INT(Nzc/63.5+0.689)*8009+Fz
08 Battery pack-A temperature (474-N)/5 *(1.01) Degrees C
09 Spacecraft facet temperature +X (474-N)/5 *(1.01) Degrees C
10 Visual display expt. CCD current 1.2*(N-30) mA (0.15A <I< 1A)
11 Solar array current -Y 200 + 1.12N mA
12 2.4 GHz beacon expt. power O/P (N-145)*0.45 mW
13 Radiation expt. EHT volts N volts
14 Radiation detectors expt. current (N+20)/8 *(0.983) mA
15 Magnetometer expt. HY-fine Fy=18.55*(Nfy-495.7) See Ch 05
16 Magnetometer expt. HX-fine Fx=18.53*(Nfx-496.45) See Ch 06
17 Magnetometer expt. HZ-fine Fz=18.34*(Nfz-493.55) See Ch 07
18 Battery pack-B temperature (474-N)/5 *(1.01) Degrees C
19 Spacecraft facet temperature -X (474-N)/5 *(1.01) Degrees C
20 Spacecraft computer current 1.2*(N-25) mA (0.125A <I< 1A)
21 Solar array current -X 200 + 1.12N mA
22 Battery / BCR +14V bus N/50 *(1.056)
23 Sun sensor +Z axis N/200 *(1.01)
24 10.4 GHz beacon expt. current (N-40)/4 * 0.97
25 Magnetometer expt. temperature (467-N)/6.85 Degrees C
26 Magnetometer expt. current (N/8)*0.9945
27 Telecommand receiver current (N-16)/8 *(0.952) mA
28 Radiation expt. temperature +X1 (474-N)/5 *(1.01) Degrees C
29 Spacecraft facet temperature -Y (474-N)/5 *(1.01) Degrees C
30 Battery charge current 2.9N mA
31 Solar array current +Y 200 + 1.12N mA
32 Power conditioning module +10V N/60 *(0.93)
33 Telemetry system current (N-16)/30 *(1.084) mA
34 2.4 GHz beacon expt. current 0.4*(N-11) *(1.072) mA
35 145 MHz data beacon power O/P (N-82)*1.67
36 145 MHz data beacon current (N-7)/4 *1.014
37 145 MHz data beacon temperature (474-N)/5 *(1.01) Degrees C
38 Pri.S/C computer temperature -X1 (474-N)/5 *(1.01) Degrees C
39 Spacecraft facet temperature +Y (474-N)/5 *(1.01) Degrees C
40 +14V line current 2.86N mA
41 +5V line current 1.28(N-50) mA (0.075A <I< 1A)
42 Power conditioning module +5V 2N/300 *(1.12)
43 Sun sensor -Z axis N/200 *(1.01)
44 HF beacons expt. current (N-36)/3 *1.038 mA
45 435 MHz data beacon power O/P (N-102)*1.792
46 435 MHz data beacon current (N-34)/3 *1.053 mA
47 435 MHz beacon temperature (474-N)/5 *(1.01) Degrees C
48 Sec.S/C computer temperature -Y1 (474-N)/5 *(1.01) Degrees C
49 Spacecraft facet temperature +Z (474-N)/5 *(1.01) Degrees C
50 +10V line current 3N mA
51 -10V line current 1.3*(N-60) mA
52 Power conditioning module -10V 0.0158N - 0.0224'N' ('N'=Ch 32)
53 Navigation magnetometer Y-axis (N-663.44)*183.486 (nT )
54 Navigation magnetometer Z-axis -(N-336.55)*189.54 (nT )
55 Navigation magnetometer X-axis -(N-496.5)*194.55 (nT )
56 Speech synthesiser current (N-16)/10 *1.009 mA
57 CCD imager temperature (474-N)/5 *(1.01) Degrees C
58 Telemetry system temperature +Y1 (474-N)/5 *(1.01) Degrees C
59 Spacecraft facet temperature -Z (474-N)/5 *(1.01) Degrees C
The navigation magnetometer is subject to temperature drift which can
cause clipping of the output.
NOTE: The axis labelling now employed is right-handed for all sub-systems.
Status points '0' '1'
------------- -------
01 145 MHz general data beacon off/on
02 435 MHz engineering data beacon off/on
03 Primary Spacecraft computer off/on
04 CCD camera module off/on
05 Radiation detector - A off/on
06 Magnetometer expt. off/on
07 7 MHz beacon expt. off/on
08 14 MHz beacon expt. off/on
09 28 MHz beacon expt. off/on
10 21 MHz beacon expt. off/on
11 2.4 GHz beacon expt. off/on
12 10.47 GHz beacon expt. off/on
13 145 MHz command RX Squelch 0= signal present
14 435 MHz command RX Squelch 0= signal present
15 Status calibrate
16 BCR status A/B
17 H.F. beacons expt. synthesisers off/on
18 Telecommand decoder status ground/primary computer
19 Magnetorquer off/on
20 Primary S/C computer block load port disable/enable
21 Secondary S/C computer data O/P active/inactive
22 Secondary S/C computer clock interrupt failure/clock OK
23 Secondary S/C computer processor running/halted
24 Secondary S/C computer power-down high/low power
25 14MHz H.F. beacon synthesiser lock out/in
26 28MHz H.F. beacon synthesiser lock OUT/IN
27 21MHz H.F. beacon synthesiser lock OUT/IN
28 Radiation detector - B off/on
29 Tip mass uncaging Confirmation no/yes
30 Speech synthesiser power off/on
31 Visual data display memory off/on
32 Gravity gradient boom motor power off/on
33 Secondary S/C computer power off/on
34 HF beacons expt. power off/on
35 Navigation magnetometer power off/on
36 S/C computer memory error bit -1
37 S/C computer memory error bit -2
38 S/C computer memory error bit -3
39 Status calibrate
40 primary S/C computer data UART O/P inactive/active
41 Gravity gradient boom motor forward/reverse
42 Magnetorquer power forward/reverse
43 Magnetometer expt. measure/calibrate
44 Navigation magnetorquer safe/arm
45 Gravity gradient boom motor safe/arm