Articles | Volume 35, issue 1
Ann. Geophys., 35, 117–121, 2017
Ann. Geophys., 35, 117–121, 2017

ANGEO Communicates 19 Jan 2017

ANGEO Communicates | 19 Jan 2017

Spin axis offset calibration on THEMIS using mirror modes

Dennis Frühauff et al.

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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.