月球向量磁場儀（Lunar Vector Magnetometer, LVM）是由國立中央大學（National Central University）太空科學與工程系太陽活動實驗室（Solar Activity and Geospace Exploration Laboratory, SAGE）所研製，是以量測月球磁場環境為科學任務目標的科學酬載。由於LVM上放置具有磁性的機構件，其磁場會導致量測結果偏差，因此為確保磁場量測的準確性及提升資料品質，需發展合適的磁場資料校正程序，並驗證其可行性。為了此目的，首先定義磁力計感測器的座標（FGM Coordinate）、校正時使用的座標（TMP Coordinate）和LVM座標（LVM Coordinate）的方向，並確立校正方法和日後登月執行之校正程序，包含軸向正確、偏移量誤差校正、雜訊濾除，以排除磁性物質跟電子干擾。當LVM在磁場強度0.5 nT的環境中，經歷收合、未完全展開和完全展開三種狀態下的量測後，分別進行收合、未完全展開及完全展開的校正程序，可將位於磁性物質旁的磁力計感測器資料誤差降低至5 μT以內，而在LVM完全展開的狀態下，遠離磁性物質的磁力計感測器資料近乎準確。;The Lunar Vector Magnetometer (LVM) is a science payload developed by the Solar Activity and Geospace Exploration Laboratory of the Department of Space Science and Engineering at National Central University. The science mission is to measure the lunar magnetic field environment. Due to the presence of magnetic components installed on the LVM, the measured magnetic field data may be biased by the instrument’s own magnetic sources. To ensure the accuracy of magnetic field measurements and enhance data quality, it is necessary to develop an appropriate magnetic field calibration procedure and verify its feasibility. For this purpose, the coordinate definitions of the magnetometer sensor (FGM Coordinate), the intermediate calibration frame (TMP Coordinate), and the instrument frame (LVM Coordinate) are first established. A comprehensive calibration methodology is then developed, including axis alignment correction, offset correction, and noise filtering, to eliminate the influence of magnetic materials and electronic interference during future lunar operations. When the LVM operates in a magnetic field environment of 0.5 nT, and undergoes measurements under three configurations—boom stowed, partially deployed, and fully deployed—the corresponding calibration procedures are applied respectively. These calibrations can reduce the measurement error of magnetometers located near magnetic components to within 5 μT. Moreover, under the fully deployed configuration, the data measured by magnetometers positioned away from the magnetic source are nearly accurate.
