THEMIS Constellation Status

28-Aug-2008   2008/241   23:35:40 UTC

Constellation Overview
Constellation Status   Spacecraft Name   THEMIS A   THEMIS B   THEMIS C   THEMIS D   THEMIS E  
  Constellation ID   P5   P1   P2   P3   P4  
  Spacecraft Status Summary   NORMAL   NORMAL   NORMAL   NORMAL   NORMAL  
Pass Support Status   Last Ground Station   BGS 11M   BGS 11M   BGS 11M   AGO 9M   AGO 9M  
  Time Since Last Pass   7.777 h 2.006 h 0.505 h 8.325 h 6.621 h
Orbit and Attitude
Orbit Geometry   Geocentric Perigee Radius   1.470 Re 1.624 Re 1.402 Re 1.613 Re 1.613 Re
  Geocentric Apogee Radius   10.767 Re 31.563 Re 19.541 Re 11.609 Re 11.610 Re
  Perigee Height   3000.5 km 3982.8 km 2564.2 km 3911.2 km 3907.3 km
  Apogee Height   62293.5 km 194934.5 km 118256.6 km 67663.5 km 67670.7 km
  Inclination   9.884 deg 15.916 deg 1.061 deg 4.692 deg 5.221 deg
  Right Ascension of Asc Node   279.094 deg 128.143 deg 194.895 deg 277.138 deg 276.360 deg
  Argument of Perigee   59.164 deg 189.847 deg 129.237 deg 62.000 deg 62.835 deg
  Orbital Period   21.312 h 95.184 h 47.716 h 23.936 h 23.937 h
  Current Orbit   534.817 rev 257.176 rev 343.333 rev 506.687 rev 506.619 rev
Inertial Attitude   Spin Axis Right Ascension   278.252 deg 103.048 deg 101.698 deg 279.306 deg 279.640 deg
  Spin Axis Declination   59.540 deg -60.954 deg -60.400 deg 60.324 deg 60.116 deg
Maneuver Status   Accumulated Delta V   396.331 m/s 391.732 m/s 299.764 m/s 389.318 m/s 376.724 m/s
  Expended Fuel Mass   20.717 kg 20.031 kg 16.020 kg 20.134 kg 19.900 kg
  Remaining Fuel Mass   28.083 kg 28.749 kg 32.790 kg 28.676 kg 28.920 kg
Power Subsystem
Bus   Bus Voltage   33.70 V 33.48 V 33.53 V 33.48 V 33.65 V
  Bus Current   1.613 A 1.946 A 2.038 A 1.360 A 1.271 A
Battery   Battery Voltage   33.72 V 33.54 V 33.55 V 33.53 V 33.69 V
  Battery Current   0.129 A -0.016 A -0.146 A -0.259 A -0.244 A
Power Converters   DC-DC Converter Current   0.213 A 0.217 A 0.218 A 0.216 A 0.215 A
  +5.2V Analog Voltage   5.18 V 5.18 V 5.20 V 5.19 V 5.20 V
  +3.3V Voltage   3.23 V 3.23 V 3.24 V 3.24 V 3.24 V
  +2.5V Voltage   2.48 V 2.48 V 2.49 V 2.49 V 2.49 V
  -5.2V Analog Voltage   -5.18 V -5.18 V -5.20 V -5.19 V -5.20 V
  +5.2V Digital Voltage   5.18 V 5.17 V 5.19 V 5.19 V 5.19 V
Solar Arrays   Solar Array 1 Current   0.439 A 0.412 A 0.463 A 0.340 A 0.347 A
  Solar Array 2 Current   0.429 A 0.419 A 0.456 A 0.334 A 0.337 A
  Solar Array 3 Current   0.446 A 0.433 A 0.469 A 0.352 A 0.349 A
  Solar Array 4 Current   0.443 A 0.452 A 0.518 A 0.361 A 0.366 A
  Total Solar Array Current   1.837 A 1.659 A 1.801 A 1.500 A 1.503 A
Shunts   Linear Shunt Current   0.000 A 0.000 A 0.000 A 0.000 A 0.000 A
  Switched Shunt Circuit 1 Status   OFF   OFF   OFF   OFF   OFF  
  Switched Shunt Circuit 2 Status   OFF   OFF   OFF   OFF   OFF  
  Switched Shunt Circuit 3 Status   OFF   OFF   OFF   OFF   OFF  
Transponder   Transmitter Current   0.739 A 0.738 A 0.754 A 0.744 A 0.743 A
  Receiver Current   0.153 A 0.149 A 0.149 A 0.152 A 0.154 A
Reaction Control System
Tanks   Pressure Transducer Power Status   ON   ON   ON   ON   ON  
  Fuel Tank Pressure   173.6 psia 177.7 psia 211.4 psia 178.5 psia 177.2 psia
  Fuel Tank 1 Liquid Temperature   14.2 C 18.5 C 15.2 C 17.8 C 13.9 C
  Fuel Tank 1 Gas Temperature   14.2 C 17.6 C 14.8 C 17.5 C 14.0 C
  Fuel Tank 2 Liquid Temperature   16.9 C 15.0 C 14.1 C 20.4 C 13.8 C
  Fuel Tank 2 Gas Temperature   16.8 C 14.5 C 13.7 C 20.1 C 14.1 C
  Pressurant Tank Pressure   195.4 psia 187.6 psia 218.3 psia 183.8 psia 188.0 psia
  Pressurant Tank Temperature   9.8 C 12.8 C 12.4 C 9.4 C 9.9 C
Heaters and Valves   Catbed Primary Heater Current   0.000 A 0.001 A 0.002 A 0.001 A 0.000 A
  Catbed Secondary Heater Current   0.000 A 0.001 A 0.001 A 0.002 A 0.002 A
  Isolation Valve Current   0.001 A 0.001 A 0.000 A 0.000 A 0.000 A
  Isolation Valve Temperature   15.5 C 14.6 C 13.9 C 19.7 C 14.0 C
  Propulsion Bus Relay Status   DISABLED   DISABLED   DISABLED   DISABLED   DISABLED  
  Latch Valve 1 Status   OPEN   OPEN   OPEN   OPEN   OPEN  
  Latch Valve 2 Status   OPEN   OPEN   OPEN   OPEN   OPEN  
Thrusters   Thruster A1 Firing Mode   NONE   NONE   NONE   NONE   NONE  
  Thruster A2 Firing Mode   NONE   NONE   NONE   NONE   NONE  
  Thruster T1 Firing Mode   NONE   NONE   NONE   NONE   NONE  
  Thruster T2 Firing Mode   NONE   NONE   NONE   NONE   NONE  
  Thruster A1 Accumulated On-time   11.44 s 14.24 s 10.23 s 33.78 s 0.00 s
  Thruster A2 Accumulated On-time   297.11 s 527.67 s 0.00 s 2433.30 s 0.00 s
  Thruster T1 Accumulated On-time   6.00 s 169.02 s 51.15 s 2.10 s 0.00 s
  Thruster T2 Accumulated On-time   6.00 s 169.02 s 51.15 s 437.54 s 0.00 s
Attitude Control System
Sun Sensor   Spacecraft Illumination   SUNLIGHT   SUNLIGHT   SUNLIGHT   SUNLIGHT   SUNLIGHT  
  Spin Rate   19.981 rpm 19.901 rpm 19.897 rpm 19.986 rpm 19.996 rpm
  Sun Aspect Angle   -6.563 deg 7.813 deg 8.063 deg -6.688 deg -6.813 deg
  Sensor Temperature   24.5 C 14.1 C 19.8 C 23.9 C 24.7 C
Inertial Reference Units   IRU Power Status   ON   ON   ON   ON   ON  
  IRU X Built-in-Test   PASS   PASS   PASS   PASS   PASS  
  IRU Y Built-in-Test   PASS   PASS   PASS   PASS   PASS  
  IRU X Rate Output   -0.02 V 0.00 V -0.05 V -0.01 V -0.03 V
  IRU Y Rate Output   0.03 V -0.00 V -0.01 V 0.01 V -0.00 V
  IRU X Temperature   31.6 C 29.2 C 34.3 C 41.9 C 35.3 C
  IRU Y Temperature   34.9 C 27.6 C 32.3 C 31.9 C 36.3 C
Transponder Subsystem
Receiver   Receiver Detector Lock Status   LOCKED   LOCKED   LOCKED   LOCKED   LOCKED  
  Receiver Carrier Lock Status   LOCKED   LOCKED   LOCKED   LOCKED   LOCKED  
  Receiver Signal Level   -112.2 dBm -110.0 dBm -121.2 dBm -103.9 dBm -108.7 dBm
Transmitter   Transmitter +5V Voltage   2.48 V 2.46 V 2.48 V 2.48 V 2.49 V
  Transmitter -5V Voltage   2.47 V 2.48 V 2.48 V 2.48 V 2.47 V
  Transmitter +12V Voltage   2.38 V 2.37 V 2.37 V 2.38 V 2.38 V
  Transmitter +20V Voltage   2.49 V 2.50 V 2.48 V 2.51 V 2.49 V
  Transmitter ALC Voltage   3.20 V 2.87 V 3.20 V 3.08 V 3.24 V
  Transmitter Output Power   37.5 dBm 37.4 dBm 37.4 dBm 37.4 dBm 37.4 dBm
  Carrier Modulation Mode   BPSK   BPSK   BPSK   PCM/PSK/PM   PCM/PSK/PM  
  Telemetry Data Rate   4K   4K   4K   4K   4K  
  Transponder Mode   COHERENT   COHERENT   COHERENT   COHERENT   COHERENT  
Temperatures   Transmitter Temperature   25.1 C 27.2 C 26.2 C 29.3 C 29.1 C
  Receiver Temperature   22.2 C 25.0 C 24.1 C 26.7 C 26.8 C
Thermal Subsystem
Battery and Decks   Battery Temperature   17.9 C 14.2 C 14.1 C 17.3 C 17.8 C
  Top Deck Temperature   7.5 C 28.6 C 30.2 C 10.2 C 10.3 C
  Axial Boom Temperature   14.3 C 12.7 C 11.8 C 15.1 C 15.6 C
  Antenna Temperature   -17.9 C -0.5 C 3.0 C -16.4 C -13.8 C
Solar Panels   Solar Panel 1 Temperature   13.7 C 11.7 C 14.2 C 13.7 C 13.2 C
  Solar Panel 2 Temperature   13.5 C 10.4 C 13.4 C 12.4 C 12.5 C
  Solar Panel 3 Temperature   12.9 C 11.0 C 13.6 C 13.0 C 13.0 C
  Solar Panel 4 Temperature   13.2 C 12.1 C 13.0 C 14.6 C 12.4 C
  Solar Panel Top Temperature   -88.4 C -31.6 C -29.6 C -88.6 C -89.1 C
  Solar Panel Bottom Temperature   -18.3 C -43.1 C -45.1 C -16.9 C -17.4 C
RCS Heaters and Fuel Lines   RCS Heater 1 Current   0.002 A 0.003 A 0.417 A 0.003 A 0.009 A
  RCS Heater 2 Current   0.002 A 0.002 A 0.002 A 0.010 A 0.016 A
  RCS Heater 3 Current   0.016 A 0.001 A 0.005 A 0.003 A 0.002 A
  RCS Fuel Line 1 Temperature   13.9 C 18.6 C 14.9 C 13.6 C 13.9 C
  RCS Fuel Line 2 Temperature   18.3 C 18.5 C 14.2 C 15.6 C 15.7 C
  RCS Service Valve Temperature   15.4 C 21.3 C 14.8 C 16.1 C 14.0 C
RCS Thrusters   Thruster A1 Temperature   14.9 C 13.4 C 16.2 C 14.4 C