RHESSI MISSION FACTS
| Mission Class | Small Explorer (SMEX) |
| Launch | February 5th, 2002, 3:58 PM EDT |
| Launch Vehicle | Orbital Sciences Corporation (OSC) Pegasus XL |
| Orbit | Circular, 600 km (373 miles), 38 degree inclination |
| Weight | 293 kg (645 lb) |
| Dimensions | Height: 2.16 m (85 in) Width: 5.76 m (227 in) after solar panel deployment, 1.1 m (43.3 in) before solar panel deployment |
| Power | 414 W |
| Onboard Memory | 4 Gbytes |
| Downlink | Up to 11 Gbits/day (3.5 Mbits/second) |
| Ground Stations | Primary: University of California, Berkeley Backups: Wallops Flight Facility, Virginia Santiago, Chile Weilheim, Germany |
| Spacecraft Pointing | Spin stabilized at 15 rpm, Sun-center pointing to 0.2 degrees. |
| Aspect System | Solar Aspect System (SAS) determines direction to Sun-center within 1.5 arcseconds, Roll Angle System (RAS) determines roll angle within 3 arcminutes |
| Detectors | 9 segmented, hyperpure germanium crystals, cooled to ~75 K (-198 degrees Celsius) |
| Energy Range | 3 keV to 17 MeV |
| Spectral Resolution | 1 keV up to 100 keV 3 keV up to 1 MeV 5 keV up to 17 MeV |
| Field of View | Full Sun (1 degree) |
| Angular Resolution | 2 arcseconds up to 100 keV 7 arcseconds up to 400 keV 36 arcseconds above 1 MeV |
| Temporal resolution | Tens of milliseconds for basic image, 2 seconds (half a rotation) for a detailed image |
| Imaging Technique | Fourier-transform imaging via 9 rotating modulation collimators (grid pairs) |
