Unit-Level AC Induced Magnetic Behavior in the Low-Frequency Regime: Measurement and Characterization

In this paper, the measurement and characterization of the unit-level, low-frequency induced magnetic response for purposes of magnetic cleanliness is presented. Firstly, we concretely describe the test measurement procedure, including the configuration of the measurement setup and the specifications required to accurately obtain the weak induced magnetic signature of a unit. Furthermore, the post-processing pipeline of the measured data for denoising purposes is illustrated through measurements of representative spacecraft equipment (RF Switch unit). Finally, the frequency domain characterization of the induced unit magnetization is performed based on dipole fitting modeling and the induced magnetization tensor is calculated as a linear combination for different orientations of the applied magnetic field.