In the following table, we list selected engineering and science instrument telemetry words (Formats C and E). Analog sensor readings have word type ’A’; word type ’B’ is for bit fields, while ’D’ represents digital values (e.g., counters). This list illustrates the redundant information that is available from telemetry, describing the thermal and electrical state of the spacecraft.
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Word |
Bit |
Definition |
Type |
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C104 |
Extended subcommutator ID. |
B | |
C105 |
RTG 2 current (0–11 A) |
A | |
C106 |
Battery voltage (0–15 V) |
A | |
C107 |
DC bus voltage (26–30 V) |
A | |
C108 |
1 |
JPL/HVM power |
B |
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2 |
ARC/PA power |
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3 |
UC/CPI power |
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4 |
UI/GTT power |
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5 |
GSFC/CRT power |
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C109 |
Battery charge current (0–0.3 A) |
A | |
C110 |
RTG 1 voltage (0–6 V) |
A | |
C111 |
Receiver A AGC CONSCAN –4 to +4 dB |
A | |
C113 |
RTG 4 voltage (0–6 V) |
A | |
C114 |
RTG 3 current (0–11 A) |
A | |
C115 |
Battery temperature (–20 to 120°)F |
A | |
C117 |
TRF +5 V output CDU Bus A (0–6 V) |
A | |
C118 |
TRF +5 V output CDU Bus B (0–6 V) |
A | |
C119 |
DC bus voltage (0–30 V) |
A | |
C121 |
Receiver B AGC CONSCAN –4 to +4 dB |
A | |
C122 |
Shunt bus current (0–3 A) |
A | |
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C123 |
RTG 4 current (0–11 A) |
A | |
C124 |
1 |
UCSD/TRD power |
B |
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2 |
USC/UV power |
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3 |
UA/IPP power |
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4 |
CIT/IR power |
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5 |
GE/AMD power |
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6 |
LaRC/MD power |
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C125 |
RTG 2 voltage (0–6 V) |
A | |
C126 |
Battery discharge current (0–10 A) |
A | |
C127 |
RTG 1 current (0–11 A) |
A | |
C128 |
1 |
Battery charge (0=auto, 1=float) |
B |
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2 |
Battery discharge (0=enabled) |
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C129 |
DC bus current (0–6 A) |
A | |
C130 |
Nitrogen tank temperature (° F) |
A | |
C131 |
RTG 3 voltage (0–6 V) |
A | |
C201 |
RTG 1 fin root temperature (160–360° F) |
A | |
C202 |
RTG 2 fin root temperature (160–360° F) |
A | |
C203 |
RTG 3 fin root temperature (160–360° F) |
A | |
C204 |
RTG 4 fin root temperature (160–360° F) |
A | |
C205 |
TWT A temperature (40–125° F) |
A | |
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C206 |
Driver a temperature (20–110° F) |
A | |
C207 |
TWT A converter temperature (40–125° F) |
A | |
C208 |
TWT A cathode current (24–30 mA) |
A | |
C209 |
Shunt bus current (0–3 A) |
A | |
C210 |
Propellant supply pressure (0–600 PSIA) |
A | |
C211 |
TWT A helix current (0–10 mA) |
A | |
C212 |
Receiver A loop stress (–100 to 100 kHz) |
A | |
C213 |
Receiver B signal strength (–149 to –63 dBm) |
A | |
C214 |
TWT B RF output power (26–40.4 dBm) |
A | |
C215 |
TWT B cathode current (24–30 mA) |
A | |
C216 |
TWT B helix current (0–10 mA) |
A | |
C217 |
RTG 4 hot junction temperature (880–1200° F) |
A | |
C218 |
RTG 3 hot junction temperature (880–1200° F) |
A | |
C219 |
RTG 2 hot junction temperature (880–1200° F) |
A | |
C220 |
RTG 1 hot junction temperature (880–1200° F) |
A | |
C221 |
TWT B converter temperature (40–125° F) |
A | |
C222 |
Receiver A VCO temperature (20–110° F) |
A | |
C223 |
Driver B temperature (20–110° F) |
A | |
C224 |
TWT A reference voltage (0–28 V) |
A | |
C225 |
+Y PSA line temperature (° F) |
A | |
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C226 |
–Y PSA line temperature (° F) |
A | |
C227 |
Receiver B VCO temperature (20–110° F) |
A | |
C228 |
TWT B temperature (40–125° F) |
A | |
C229 |
Receiver B loop stress (–100 to 100 kHz) |
A | |
C230 |
TWT B reference voltage (0–28 V) |
A | |
C231 |
TWT A RF output power (26–40.4 dBm) |
A | |
C232 |
Receiver A signal strength (–149 to –63 dBm) |
A | |
C301 |
Platform temperature 1 (0–140° F) |
A | |
C302 |
Platform temperature 2 (0–140° F) |
A | |
C303 |
SRA temperature (–10 to 95° F) |
A | |
C304 |
Platform temperature 3 (0–140° F) |
A | |
C308 |
1 |
Receiver A signal present |
B |
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2 |
Receiver B signal present |
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3 |
Receiver A oscillator enabled |
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4 |
Receiver B oscillator enabled |
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5 |
Spin thruster B pulse count |
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6 |
Spin thruster A pulse count |
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C309 |
Velocity thruster cluster 1 temperature (40–200° F) |
A | |
C310 |
Spin thruster cluster temperature (40–200° F) |
A | |
C311 |
VPT 1 temperature (400–1800° F) |
A | |
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C312 |
VPT 2 temperature (400–1800° F) |
A | |
C316 |
1 |
CONSCAN power |
D |
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2 |
CONSCAN threshold (1=above) |
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4 |
Receiver switch status (1=A/B=Hi/Med) |
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5 |
Transmitter switch status (1=A/B=Med/Hi) |
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6 |
Antenna feed switch status (1=offset) |
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C317 |
SSA temperature (–30 to 194° F) |
A | |
C318 |
Platform temperature 4 (0–140° F) |
A | |
C319 |
Platform temperature 5 (0–140° F) |
A | |
C320 |
Platform temperature 6 (0–140° F) |
A | |
C321 |
Velocity thruster 2 (1B) pulse count |
D | |
C322 |
Velocity thruster 4 (2A) pulse count |
D | |
C324 |
1 |
Command memory status (0=processing, 1=standby) |
B |
C325 |
VPT 4 temperature (400–1800° F) |
A | |
C326 |
Velocity thruster cluster 2 temperature (40–200° F) |
A | |
C327 |
Propellant supply temperature (40–160° ) |
A | |
C328 |
VPT 3 temperature (400–1800° F) |
A | |
C329 |
Velocity thruster 1 (1A) pulse count |
D | |
C330 |
Velocity thruster 3 (2B) pulse count |
D | |
C403 |
1 |
Precession pair (1=VPT 1&4) |
D |
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2–4 |
Pulse length bits 1–3 |
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5 |
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6 |
Spin control direction (0=up) |
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C404 |
1–5 |
Star time gate bits 0–4 |
D |
|
6 |
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C405 |
Spin period MSB |
D | |
C406 |
Spin period |
D | |
C407 |
Spin period LSB |
D | |
C408 |
1–5 |
Roll pulse/index pulse phase error bits 4–0 |
D |
|
6 |
Phase error sign (1=roll pulse before index pulse) |
|
C409 |
1 |
VPT 1 firing status |
B |
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2 |
VPT 2 firing status |
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3 |
VPT 4 firing status |
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4 |
VPT 3 firing status |
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5 |
SCT 1 firing status |
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6 |
SCT 2 firing status |
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C410 |
1 |
Despin on/off |
D |
|
2 |
CONSCAN enabled |
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C421 |
1–2 |
Star count bits 0–2 |
D |
|
4 |
CEA power status DSL A |
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5 |
CEA power status DSL B |
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6 |
CEA power status PSE |
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E101 |
ARC/PA detectors temperature |
A | |
E102 |
ARC/PA electronics temperature |
A | |
E109 |
USC/UV electronics temperature |
A | |
E110 |
UC/CPI electronics temperature |
A | |
E117 |
CIT/IR low range temperature |
A | |
E118 |
GE/AMD preamp temperature |
A | |
E125 |
GSFC/CRT electronics temperature |
A | |
E128 |
GSFC/CRT detector temperature |
A | |
E201 |
CIT/IR high range temperature |
A | |
E209 |
UCSD/TRD electronics temperature |
A | |
E221 |
UI/GTT electronics temperature |
A | |
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