In-orbit calibration of the lunar magnetometer onboard SELENE (KAGUYA)

Futoshi Takahashi, Hisayoshi Shimizu, Masaki Matsushima, Hidetoshi Shibuya, Ayako Matsuoka, Satoru Nakazawa, Yuichi Iijima, Hisashi Otake, Hideo Tsunakawa

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The high-sensitivity fluxgate Lunar MAGnetometer (LMAG) is mounted on SELENE (KAGUYA) to investigate the near-surface electromagnetic environment and the evolution of the Moon through magnetic field observation. To avoid possible electromagnetic interferences, a triaxial fluxgate sensor (MGF-S) is installed at the far end of a 12-m-Iong mast. It is critical for the accurate observation to monitor MGF-S alignment in orbit, and thus we have calibrated the sensor alignment by measuring the known magnetic fields generated by the sensor alignment monitor coil (SAM-C) wound onto the mast canister. In-orbit calibration of the MGF-S alignment was performed twice each revolution during the initial check-out phase of the satellite. It is concluded that there is no systematic difference in the sensor alignment between the day-side and night-side. Applying a new technique based on the Davis-Smith method to the observed magnetic field data when KAGUYA was exposed to the solar wind, a zero offset of each axis was quickly and stably determined every month. As a result, LMAG has been calibrated with an accuracy that is sufficient for detection of the lunar magnetic anomaly at an altitude of 100 km and for high-resolution electron reflectometry.

Original languageEnglish
Pages (from-to)1269-1274
Number of pages6
Journalearth, planets and space
Volume61
Issue number11
DOIs
Publication statusPublished - 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geology
  • Space and Planetary Science

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    Takahashi, F., Shimizu, H., Matsushima, M., Shibuya, H., Matsuoka, A., Nakazawa, S., Iijima, Y., Otake, H., & Tsunakawa, H. (2009). In-orbit calibration of the lunar magnetometer onboard SELENE (KAGUYA). earth, planets and space, 61(11), 1269-1274. https://doi.org/10.1186/BF03352979