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USA 101

Also called P90-5 or TAOS (Technology for Autonomous Operations Survivability) or Step 0


Designation 23030 / 94017A
Launch date 13 Mar 1994
Country of origin United States
Mission Military: technology
Perigee/Apogee 556/568 km
Inclination 105°
Period 95.9 min
Launch vehicle Taurus 01
Mass at launch 500 kg

Operated by USAF, built by TRW from an Eagle platform

To demonstrate autonomous navigation, standardized space data bus, advanced radiation hardened processors, and laser and radar sensors. It carries autonomous navigation systems and a GPS receiver, in an attempt to reduce the need for ground controllers.

External resources

sat-index articles

Technical data


Prime contractor TRW
Platform STEP
Mass at launch  
Mass in orbit  
Solar array  
Stabilization 3-axis
DC power 450 W
Design lifetime 1.5 year

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