3:30 PM - 5:00 PM
[PPS06-P23] Initial Results of KPLO-MAGnetometer Data in the IMF Region and the Earth’s Magnetosphere
The Korean Pathfinder Lunar Orbiter (KPLO, also known as the Danuri) was launched on August 5, 2022, by SpaceX Falcon 9 rocket and flew the Ballistic Lunar Transfer (BLT) orbit for ~4.5 months in the interplanetary region. In the middle of December 2022, the KPLO was inserted into the highly elliptical orbit on the Moon and then favorably circulated on the Moon at an altitude of ~100 km in current. The KPLO-MAGnetometer (KMAG) equipped on the KPLO satellite is a magnetic field measurement instrument consisting of three tri-axial fluxgate magnetometer sensors (MAG1, MAG2, and MAG3) inside a 1.2-meter boom cylinder. These three sensors were installed at different distances from the spacecraft body, on which KMAG1 and KMAG3 are placed at the farthest and the closest, respectively. The KMAG was successfully deployed four hours after launch and immediately started observing the magnetic field in space. The time-dependent variation of the magnetic field data in the solar wind region observed from the KMAG shows a similar tendency with a time-shifted DSCOVR measurement around the L1 point but a different magnitude for observation. This characteristic of the KMAG measurement is also shown around the lunar circular orbit. Some significant reasons, such as the sensor-biased difference and the effect of the spacecraft maneuver, caused the difference between the initial data from the KMAG and the reference data from other satellites. This difference is expected from originating the non-natural magnetic source inside the spacecraft body. Therefore, to remove these non-natural magnetic disturbances, the KMAG team processes to correct the initially observed magnetic field data using the reference data from the DSCOVR and the ARTEMIS. In this paper, we present the initial results of the KMAG measurement corrected on near-Earth space and the interplanetary region.