Measurement of QSAT Residual Magnetism

概要

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The Space Environment Research Center of the Kyushu University (SERC) is developing a magnetometer which is one of the mission instrument of the Kyushu Satellite (QSAT). We must understand residual magnetism around the magnetometer in order to correctly measure the magnetic field in space. In fact, the QSAT bus system may have considerable residual magnetism. There is a possibility that this residual magnetism will have a bad effect on the mission, so we have to measure it and estimate how much effect it will have on the mission magnetometer. For the reasons stated above, we have developed a measurement system for residual magnetism of all satellite's bus units semi-automatically. This system uses the UGF-3 magnetometer. Thanks to this instrument, it is possible to estimate residual magnetism of QSAT bus units precisely even in a regular laboratory. This system can estimate residual magnetism of a sample, if its moment is larger than 0.0001 [Am^2]. Also, the result possesses higher reliability, if the magnetic moment is larger than 0.01 [Am^2]. We completed measuring eight units’ residual magnetism, and we analyzed how much magnetic interference would be caused to the mission magnetometer. The results are much less than permissible levels, so magnetic interference is not a critical problem in our view.
九州大学の論文
2007-02-01