Geomagnetic Field Observation Using Fluxgate Magnetometer System Onboard Balloons in Antarctica

概要

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A long-duration experimental program on the use of balloons for polar geophysical observations planned by the Japan National Institute of Polar Research (NIPR) was carried out by the 44th Japanese Antarctic Research Expedition at Syowa Base, Antarctica in January 2003. We have developed a new fluxgate magnetometer system, which was installed in two balloons for the detection of the balloon motion using the geomagnetic field. Detection of the motion is very important because perturbations of the geomagnetic field depend on the magnetometer sensor motion itself. The high-resolution fluxgate magnetometer system developed for balloon experiments is composed of an 8-directional sun pulse sensor, a biaxial inclinometer and a pulse clock counter. Two balloons were launched on 13^<th> January, 2003. The balloons flew 150km apart from each other and at the same altitude of 31.5km. We obtained the magnetometer data of the two balloons by using information relayed from satellites for 11 days and 25 days. As a result, the attitude perturbation of the gondola was detected. In this paper, we describe the new magnetometer system and the attitude motion of the large balloons.
東海大学の論文