A 2015 Igrf Candidate Model Based on Swarm’s Experimental ASM Vector Mode Data

Pierre Vigneron1, Gauthier Hulot2, Nils Olsen3, Jean-Michel Leger4, Thomas Jager5, Laura Brocco6, Olivier Sirol7, Pierdavide Coïsson8, Xavier Lalanne6, Arnaud Chulliat9, Francois Bertrand5, Axel Boness4 and Isabelle Fratter10, (1)Université de Paris, Institut de physique du globe de Paris, CNRS, Paris, France, (2)Université Paris Cité, Institut de physique du globe de Paris, CNRS, Paris, France, (3)Technical University of Denmark - Space, Kongens Lyngby, Denmark, (4)CEA-LETI, Grenoble, France, (5)CEA-Léti, Université Grenoble Alpes, MINATEC, Grenoble, France, (6)Institut de Physique du Globe de Paris, Paris, France, (7)Université de Paris, Institut de physique du globe de Paris, Paris, France, (8)Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS/INSU, Paris, France, (9)National Geophysical Data Center, Boulder, United States, (10)CNES French National Center for Space Studies, Toulouse Cedex 09, France
Abstract:
Each of the three Alpha, Bravo and Charlie satellites of the ESA Swarm mission carries an Absolute Scalar Magnetometer (CNES customer furnished ASM instrument designed by CEA-Léti) that provides the nominal 1 Hz scalar data of the mission, but also delivers 1 Hz experimental vector data. Tests during the commissioning and calibration/validation phase have shown that these data and the rigidity of the boom mechanically linking the ASM to the star imager (STR) on Alpha and Bravo were of such good quality that an IGRF candidate geomagnetic field model could possibly be produced from such ASM-only data (without having to resort to any of the nominal vector field magnetometer (VFM) data of the mission). In this presentation, we will report on our efforts to build such an IGRF candidate, which intends to provide an image of the January 1, 2015 Geomagnetic Field, alternative to the images provided by IGRF candidate models based on Swarm nominal L1b data, or other data.
Back to: ESA's Swarm Mission, One Year in Space III Posters