D Selected Engineering and Science Instrument Telemetry Words

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.





Word

Bit

Definition

Type




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

2

ARC/PA power

3

UC/CPI power

4

UI/GTT power

5

GSFC/CRT power

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

C123

RTG 4 current (0–11 A)

A

C124

1

UCSD/TRD power

B

2

USC/UV power

3

UA/IPP power

4

CIT/IR power

5

GE/AMD power

6

LaRC/MD power

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

2

Battery discharge (0=enabled)

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

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

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

2

Receiver B signal present

3

Receiver A oscillator enabled

4

Receiver B oscillator enabled

5

Spin thruster B pulse count

6

Spin thruster A pulse count

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

C312

VPT 2 temperature (400–1800° F)

A

C316

1

CONSCAN power

D

2

CONSCAN threshold (1=above)

4

Receiver switch status (1=A/B=Hi/Med)

5

Transmitter switch status (1=A/B=Med/Hi)

6

Antenna feed switch status (1=offset)

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

2–4

Pulse length bits 1–3

5

Δv pair (1=VPT 1&3)

6

Spin control direction (0=up)

C404

1–5

Star time gate bits 0–4

D

6

Δv/SCT mode enabled

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

2

VPT 2 firing status

3

VPT 4 firing status

4

VPT 3 firing status

5

SCT 1 firing status

6

SCT 2 firing status

C410

1

Despin on/off

D

2

CONSCAN enabled

C421

1–2

Star count bits 0–2

D

4

CEA power status DSL A

5

CEA power status DSL B

6

CEA power status PSE

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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