In situ calibration of the Swarm-Echo magnetometers

[摘要] CASSIOPE/e-POP, now known as Swarm-Echo, was launched in 2013 to study polarplasma outflow, neutral escape, and the effects of auroral currents on radiopropagation in the ionosphere. The e-POP suite contains an array of eightinstruments, including two fluxgate magnetometers on a shared boom. Untilnow, the two magnetometers relied on a set of preflight calibrations, whichlimited the accuracy of the magnetic field product and the magnetometers' utility forsome applications. Here we present the results of an in situ calibrationperformed on data from 3 January 2014 to 30 January 2021 and a casestudy showing the improvements the calibration has made to the data utility.Periodic vector–vector calibration using the CHAOS magnetic field modelresults achieves an estimated root-mean-square (rms) uncertainty of 9 nT during nominaloperation. This data product is now openly available through the ESA Swarmrepository.

[学科分类] 再生能源与代替技术