Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Correction of Spacecraft Magnetic Field Noise: Initial KMAG Observation in the Solar Wind

Junhyun Lee
,
Ho Jin
* ORCID logo ,
Khan-Hyuk Kim
,
Hyeonhu Park
ORCID logo ,
Wooin Jo
,
Yunho Jang
,
Hyeonji Kang
,
Eunhyeuk Kim
,
Young-Jun Choi
Version 1 : Received: 28 October 2023 / Approved: 30 October 2023 / Online: 31 October 2023 (03:49:12 CET)

A peer-reviewed article of this Preprint also exists.

Lee, J.; Jin, H.; Kim, K.-H.; Park, H.; Jo, W.; Jang, Y.; Kang, H.; Kim, E.; Choi, Y.-J. Correction of Spacecraft Magnetic Field Noise: Initial Korean Pathfinder Lunar Orbiter MAGnetometer Observation in Solar Wind. Sensors 2023, 23, 9428. Lee, J.; Jin, H.; Kim, K.-H.; Park, H.; Jo, W.; Jang, Y.; Kang, H.; Kim, E.; Choi, Y.-J. Correction of Spacecraft Magnetic Field Noise: Initial Korean Pathfinder Lunar Orbiter MAGnetometer Observation in Solar Wind. Sensors 2023, 23, 9428.

Abstract

The Korean Pathfinder Lunar Orbiter (KPLO)-MAGnetometer (KMAG) consists of three triaxial fluxgate sensors (MAG1, MAG2, and MAG3) to measure the magnetic field around the Moon. The three sensors are mounted in the order of MAG3, MAG2, and MAG1 inside a 1.2 m long boom away from the satellite body. Before it arrived on the Moon, we compared the magnetic field measurements taken by DSCOVR and KPLO in the solar wind to verify the measurement performance of the KMAG instrument. We found that there were artificial disturbances in the KMAG measurement data, such as step-like and spike-like disturbances, which were produced by the spacecraft body. To remove spacecraft-generated disturbances, we applied a multi-sensor method, employing the gradiometer technique and principal component analysis and using KMAG magnetic field data and confirmed the successful elimination of spacecraft-generated disturbances. This indicates that the multi-sensor method is able to clean the magnetic field data measured onboard the KPLO.

Keywords

Korean Pathfinder Lunar Obiter mission; spacecraft-generated disturbance; gradiometer technique; initial KMAG observation

Subject

Environmental and Earth Sciences, Space and Planetary Science

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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