Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2010-12-07
Advances in Geosciences, Volume 19: Planetary Science (PS). Edited by Anil Bhardwaj. Singapore: World Scientific, 2010, p.151
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
11 pages, 6 figures
Scientific paper
SARA experiment aboard the first Indian lunar mission Chandrayaan-1 had the objective to explore the solar wind-lunar interaction using energetic neutral atoms (ENA) from the lunar surface as diagnostic tool. SARA consisted of an ENA imaging mass analyzer CENA (Chandrayaan-1 Energetic Neutral Analyzer) and an ion mass analyser SWIM (Solar Wind Monitor), along with a digital processing unit (DPU) which commands and controls the sensors and provides the interface to the spacecraft. Both sensors have provided excellent observational data. CENA has observed ENAs from the lunar surface and found that ~20% of the incident solar wind ions get backscattered as ENAs from the lunar surface. This is contrary to the previous assumptions of almost complete absorption of solar wind by the lunar surface. The observation is relevant for other airless bodies in the solar system.
Barabash Stas
Bhardwaj Anil
Dhanya M. B.
Holmström Mats
Kazushi Asamura
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