Step 4

Also called P95-1

---

General

Designation	25013 / 97063A
Launch date	22 Oct 1997
Country of origin	United States
Mission	Military: ?
Perigee/Apogee	434/501 km (600 km planned)
Inclination	45°
Period	94 min
Launch vehicle	Pegasus #18

Cost: $52 million

---

End of life

Out of service	22 Oct 1997
Cause	Contact was lost right after launch and the solar panels did not deploy. In such conditions the lifetime of the satelllite is limited by the batteries.

---

External resources

sat-index articles

Technical data

---

---

Specifications

Prime contractor	TRW
Platform	STEP
Mass at launch	391.5 kg
Mass in orbit
Dimension	1.52 x 0.91 m
Solar array
Stabilization	3-axis
DC power	183 W
Design lifetime	2 years

S-band telemetry

---

Payload

Digital Ion Drift Meter (DIDM)
Electromagnetic Propagation Experiment (EMPE)
Orbiting Ozone and Aerosol Measurement (OOAM)

---