In-flight calibration of the spin axis offset of a fluxgate magnetometer with an electron drift instrument

We show that the spin axis offset of a fluxgate magnetometer can be calibrated with an electron drift instrument (EDI) and that the required input time interval is relatively short. For missions such as Cluster or the upcoming Magnetospheric Multiscale (MMS) mission the spin axis offset of a fluxgate magnetometer could be determined on an orbital basis. An improvement of existing methods for finding spin axis offsets via comparison of accurate measurements of the field magnitude is presented, that additionally matches the gains of the two instruments that are being compared. The technique has been applied to EDI data from the Cluster Active Archive and fluxgate magnetometer data processed with calibration files also from the Cluster Active Archive. The method could prove to be valuable for the MMS mission because the four MMS spacecraft will only be inside the interplanetary field (where spin axis offsets can be calculated from Alfvenic fluctuations) for short periods of time and during unusual solar wind conditions.

[1]  Fritz Primdahl,et al.  Calibration of the Ørsted vector magnetometer , 2003 .

[2]  Christopher T. Russell,et al.  Accurate determination of magnetic field gradients from four point vector measurements. I. Use of natural constraints on vector data obtained from a single spinning spacecraft , 1996 .

[3]  Christopher T. Russell,et al.  An advanced approach to finding magnetometer zero levels in the interplanetary magnetic field , 2008 .

[4]  R. Steiner.  History and progress on accurate measurements of the Planck constant , 2013, Reports on progress in physics. Physical Society.

[5]  P. A. Puhl-Quinn,et al.  Archiving of the cluster EDI data , 2006 .

[6]  S. A. Curtis,et al.  Magnetospheric Multiscale Mission , 2005 .

[7]  M. W. Dunlop,et al.  The Cluster Magnetic Field Investigation: overview of in-flight performance and initial results , 2001 .

[8]  S. Curtis,et al.  The Magnetospheric Multiscale Mission...Resolving Fundamental Processes in Space Plasmas , 1999 .

[9]  Wolfgang Baumjohann,et al.  EDI convection measurements at 5–6 RE in the post-midnight region , 1999 .

[10]  E. A. Lucek,et al.  The status of Cluster FGM data submissions to the CAA , 2006 .

[11]  Wolfgang Baumjohann,et al.  THE ELECTRON DRIFT INSTRUMENT FOR CLUSTER , 1997 .

[12]  K.-H. Glassmeier,et al.  The magnetic field experiment onboard Equator-S and its scientific possibilities , 1999 .

[13]  Fritz Primdahl,et al.  Scalar calibration of vector magnetometers , 2000 .

[14]  Roy B. Torbert,et al.  Use of EDI time-of-flight data for FGM calibration check on cluster , 2006 .

[15]  G. Paschmann,et al.  EDI electron time-of-flight measurements on Equator-S , 1999 .