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Step 1

Also called P90 A or P90-1


Launch date 27 Jun 1994
Country of origin United States
Mission Military: technology
Launch vehicle Pegasus #6 (XL)

End of life

Out of service 27 Jun 1994
Cause Destroyed on launch with the launcher

Operated by USAF and built by TRW from an Eagle platform

It carried radio propagation experiments, a plasma environment analyser, the CHAMPION ionosphere-magnetosphere coupling experiment, and an accelerometer and mass spectrometer to study the upper atmosphere.

Technical data


Prime contractor TRW
Platform STEP
Mass at launch  
Mass in orbit  
Solar array  
Stabilization 3-axis
DC power 105 W
Design lifetime 1 year

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