STEP 4 (P95-1)
STEP 4 [TRW]
STEP 4 (Space Test Experimental Program 4) hosted three DoD payloads:
- Digital Ion Drift Meter (DIDM) to study ion drift,
- Electromagnetic Propagation Experiment (EMPE) to aid study radio propagation through the ionosphere, and
- Orbiting Ozone and Aerosol Measurement (OOAM) to study ozone and water vapour in the middle atmosphere.
After reaching orbit, the solar panels failed to deploy properly, and there has been little or no uplink or downlink contact with the spacecraft.
| Nation: | USA |
|---|---|
| Type / Application: | Experimental |
| Operator: | USAF STP (Space Test Program) |
| Contractors: | TRW, CTA → Orbital Sciences Corporation (OSC) (Bus) |
| Equipment: | DIDM, EMPE, OOAM |
| Configuration: | LEOStar |
| Propulsion: | ? |
| Power: | 4 deployable fixed solar arrays, batteries |
| Lifetime: | |
| Mass: | 403 kg |
| Orbit: | 430 km × 500, 45, was to be m |
| Satellite | Date | LS | Launch Vehicle | Remarks | |
|---|---|---|---|---|---|
| STEP 4 (P95-1) | 23.10.1997 | WI, L-1011, RW04/22 | Pegasus-XL |
Further STEP / TSX missions:
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Further STP missions:
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