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Spacecraft Details

  • 5 year design life with redundant architecture
  • Orbit: 824 km, sun-synch (i=98.7 deg), 1:30 pm Ascending Node
  • Observatory Mass - 2132.8 kg
  • S/C Power - 2600 W capability (EOL)
  • S-band Command and Telemetry
      - Ground (Svalbard)
        Uplink:2 & 128 kbps
        Downlink:1, 4, 16, 32 kbps real-time TLM
        512 kbps playback TLM
      - TDRSS
        Uplink: 0.125 & 1 kbps
        Downlink:1, 4, 16 kbps real-time TLM
  • X-band 300 Mbps Stored Mission Data (SMD) downlink
      - SSR has SMD storage capacity for 3.5 orbits (343 Gbit)
      - Simultaneous playback while recording SMD
      - X-band 15 Mbps High Rate Data direct broadcast of mission data
      - Real-time downlink of mission data to users within HRD antenna FOV
      - Continuous operation in normal science mode
  • Support 5 instrument payload suite
      - ATMS, CERES, & OMPS (1553 data interface)
      - CrIS & VIIRS (1394 data interface)
  • Controlled Reentry
    Enhanced propulsion module (320 kg propellant - Propulsion Anhydrous Hydrazine (N2H4))
      - 2 sets of 4 thrusters (pri/red sets)
  • MELV launch vehicle compatible
      - ULA Delta-II (7920-10 configuration)
      - 4-point launch vehicle interface (6915 PAF)
  • ADCS approach - 3-axis stabilized, star tracker/GYRO/reaction wheels
  • Payload Mass - 610 kg
  • Payload Power - 630 W - orbit average science mode
  • Pointing - Control - 28 arc/sec (108 arc/sec req)
  • Pointing - Knowledge - 28 arc/sec (108 arc/sec req)
  • Pointing - Control - 28 arc/sec (108 arc/sec req)
  • Jitter/Stability - <3 arssec/dt (18.6 arcsec req)