| Mass | |
|---|---|
| Spacecraft Bus | 598 kg |
| Fuel | 388.3 kg |
| Science Payload | 75.8 kg |
| Total (at Launch) | 1,062.1 kg |
| Spacecraft Size | |
|---|---|
| Body | approximately 1.5 m square by 3 m high |
| Solar Panels | extended, about 12 m tip-to-tip |
| Antenna and Boom | HGA 1.5m dia. on 2m boom |
| Basic Attitude Control Design | Three axis control system using reaction wheels and twelve 4.45N thrusters |
|---|
| Pointing | Performance requirements |
|---|---|
| Stability | 1 milliradian (for 0.5 second); 3 milliradians (for 12 seconds) |
| Control | 10 milliradians |
| Knowledge | 3 milliradians |
| Command Rate | 12.5 commands per second (maximum) |
|---|---|
| Data Rates | |
|---|---|
| Uplink | 500 bits per second (maximum) |
| Downlink | 85.3 kilobits per second (maximum) |
| Downlink Radio Frequency Power | 26 watts |
|---|
| Solid State Recorders | 3-gigabit capacity (total) |
|---|
| Solar Arrays | 4 panels/ total output power 980 watts (maximum) |
|---|