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    • Keywords


      Moon, Moon-solar wind interaction; lunar elemental composition; lunar magnetic anomalies; Energetic Neutral Atom (ENA); lunar mission

    • Abstract


      This paper reports on the Sub-keV Atom Reflecting Analyzer (SARA) experiment that will be flown on the first Indian lunar mission Chandrayaan-1. The SARA is a low energy neutral atom (LENA) imaging mass spectrometer, which will perform remote sensing of the lunar surface via detection of neutral atoms in the energy range from 10 eV to 3 keV from a 100km polar orbit. In this report we present the basic design of the SARA experiment and discuss various scientific issues that will be addressed. The SARA instrument consists of three major subsystems: a LENA sensor (CENA), a solar wind monitor (SWIM), and a digital processing unit (DPU). SARA will be used to image the solar wind-surface interaction to study primarily the surface composition and surface magnetic anomalies and associated mini-magnetospheres. Studies of lunar exosphere sources and space weathering on the Moon will also be attempted. SARA is the first LENA imaging mass spectrometer of its kind to be flown on a space mission. A replica of SARA is planned to fly to Mercury onboard the BepiColombo mission.

    • Author Affiliations


      Anil Bhardwaj1 Stas Barabash2 Yoshifumi Futaana2 Yoichi Kazama2 Kazushi Asamura3 David McCann2 R Sridharan1 Mats Holmstrom2 4 Peter Wurz5 Rickard Lundin2

      1. Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum - 695 022, India
      2. Swedish Institute of Space Physics, Box 812, Kiruna - 98128, Sweden
      3. Japan Aerospace Exploration Agency, Sagamihara, Kanagawa - 229- 8510, Japan
      4. Currently at NASA Goddard Space Flight Center, Mail Code 612.2, Greenbelt, MD - 20771, USA
      5. Physikalisches Institut, University of Bern, Bern - CH- 3012, Switzerland
    • Dates

  • Journal of Earth System Science | News

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