Articles | Volume 35, issue 1
ANGEO Communicates
19 Jan 2017
ANGEO Communicates |  | 19 Jan 2017

Spin axis offset calibration on THEMIS using mirror modes

Dennis Frühauff, Ferdinand Plaschke, and Karl-Heinz Glassmeier

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Vector magnetic field instruments mounted on spacecraft require precise in-flight calibration of the offsets of all three axes, i.e., the output in vanishing ambient field. While calibration of the spin plane offsets is trivial, we apply a new technique for determining the spin axis offset, not relying on solar wind data but on magnetosheath encounters. This technique is successfully applied to the satellites of the THEMIS mission to update the calibration parameters of the complete mission.