Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm11b1611l&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM11B-1611
Physics
2731 Magnetosphere: Outer, 2799 General Or Miscellaneous
Scientific paper
The in-flight determination of magnetometer zero levels is an important step of the overall calibration procedure, especially if the field to be measured is weak. In low- field regions within a magnetosphere the precision of magnetic field models is insufficient for calibration purposes. If a magnetometer has erroneous zero levels a pure change of the field magnitude becomes a change of field magnitude plus a change of the direction of the field. We present a novel new automated technique that searches for data intervals that contain pure changes of the field magnitude by using a set of sophisticated selection criteria. Directional changes are then removed from the selected data intervals via adjustment of zero levels. We further present results of the application of our technique using THEMIS magnetic field data along with various cross validations and estimates of error.
Angelopoulos Vassilis
Leinweber H. K.
Russell Christopher T.
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