The absolute magnetometers on board Swarm, lessons learned from more than two years in space

Gauthier Hulot, Jean-Michel Leger, Pierre Vigneron, Nils Olsen, Thomas Jager, François Bertrand, Isabelle Fratter, Pierdavide Coïsson, Olivier Sirol, Xavier Lalanne

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review


ESA's Swarm satellites carry 4He absolute magnetometers (ASM), designed by CEA-Léti and developed in partnership with CNES. These instruments are the first-ever space-borne magnetometers to use a common sensor to simultaneously deliver 1Hz independent absolute scalar and vector readings of the magnetic field. They have provided the very high accuracy scalar field data nominally required by the mission (for both science and calibration purposes, since each satellite also carries a low noise high frequency fluxgate magnetometer designed by DTU), but also very useful experimental absolute vector data. They have also been run for short periods of time in a so-called burst mode to deliver absolute scalar data at 250 Hz. In this presentation, we will report on the various tests and investigations carried out using these data since launch in November 2013. In particular, we will illustrate the advantages of flying ASM instruments on space-borne magnetic missions for data quality checks, geomagnetic field modeling and science objectives.
Original languageEnglish
Publication date2016
Number of pages1
Publication statusPublished - 2016
EventESA Living Planet Symposium 2016 - Prague, Czech Republic
Duration: 9 May 201613 May 2016


ConferenceESA Living Planet Symposium 2016
Country/TerritoryCzech Republic
Internet address


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