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Atmosphere-Space Transition Region Explorer 
Summary
Atmosphere-Space Transition Region Explorer (ASTRE) is a mission concept proposed in 2011 to NASA's Medium-Class Explorers program (MIDEX) to study the interaction between the Earth's atmosphere and the ionized gases in outer space in an effort to understand how space-induced currents in electric power grids originate, as well as improve satellite drag models.[1] The spacecraft would measure ionized gases within the transition region/boundary layer between 150–250 km altitude.[2][3] The concept was not selected for development at that time.
The Principal Investigator is Robert F. Pfaff from the Goddard Space Flight Center in Greenbelt, Maryland.[1]
References edit
- ^ a b NASA - NASA Selects Science Investigations For Concept Studies.
- ^ The Atmosphere-Space Transition Region Explorer (ASTRE) -- Using in situ Measurements on a Low Perigee Satellite to Understand How the Upper Atmosphere and Magnetosphere are Coupled. Robert F Pfaff Jr. Triennial Earth-Sun Summit.
- ^ Atmosphere-Space Transition Region Explorer (ASTRE). Robert F. Pfaff. 11 December 2011. Transcription from a presentation.