Atmosphere-Space Transition Region Explorer
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. The spacecraft would measure ionized gases within the transition region/boundary layer between 150-250 km altitude. The concept was not selected for development at that time.
- 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.
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