Residual Magnetization Measurements of Satellite Instruments in Large Spherical Magnetic Shield Room

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  • Shirasawa Hidetaka
    Department of Aeronautics and Astronautics, Tokai University
  • Tohyama Fumio
    Department of Aeronautics and Astronautics, Tokai University
  • Hirokawa Eiji
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency

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Other Title
  • 宇宙飛しょう体用大型磁気シールドルームにおける衛星搭載機器の残留磁気計測
  • 宇宙飛翔体用大型磁気シールドルームにおける衛星搭載機器の残留磁気計測
  • ウチュウヒショウタイヨウ オオガタ ジキ シールドルーム ニ オケル エイセイ トウサイ キキ ノ ザンリュウ ジキ ケイソク

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Abstract

It is important to measure residual magnetization value of satellite instruments before launch because that the residual magnetization may cause to perturb an attitude of satellite and give much magnetic offset to onboard instruments. In recent pre-launch EMC tests, strict obligation is required on the remaining magnetism for deep space investigation or magnetic filed observation satellites. The measurement of residual magnetization in a magnetic shield room was a hard work because of consuming much time and manpower.<br>We have developed a method for measuring residual magnetization of satellite instruments used by two fluxgate magnetometers and 2-axis rotational table. The resolution of measuring magnetic moment is ±0.01 [Am2] and it takes 2 minutes of detecting time for an instrument. We can measure some satellite instruments with a high accuracy of more than one order on magnetic moment and with a time consumption of less than 1/10 on working time as compared with that of past EMC test. This accuracy and the real timed data acquisition are great improved and this method is useful for pre-launch tests.

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