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| Titel |
An initial investigation of the long-term trends in the fluxgate magnetometer (FGM) calibration parameters on the four Cluster spacecraft |
| VerfasserIn |
L. N. S. Alconcel, P. Fox, P. Brown, T. M. Oddy, E. L. Lucek, C. M. Carr |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2193-0856
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Instrumentation, Methods and Data Systems ; 3, no. 2 ; Nr. 3, no. 2 (2014-07-11), S.95-109 |
| Datensatznummer |
250115215
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| Publikation (Nr.) |
 copernicus.org/gi-3-95-2014.pdf |
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| Zusammenfassung |
| Over the course of more than 10 years in operation, the calibration
parameters of the outboard fluxgate magnetometer (FGM) sensors on the four
Cluster spacecraft are shown to be remarkably stable. The parameters are
refined on the ground during the rigorous FGM calibration process performed
for the Cluster Active Archive (CAA). Fluctuations in some parameters show
some correlation with trends in the sensor temperature (orbit position). The
parameters, particularly the offsets, of the spacecraft 1 (C1) sensor have
undergone more long-term drift than those of the other spacecraft (C2, C3
and C4) sensors. Some potentially anomalous calibration parameters have been
identified and will require further investigation in future. However, the
observed long-term stability demonstrated in this initial study gives
confidence in the accuracy of the Cluster magnetic field data. For the most
sensitive ranges of the FGM instrument, the offset drift is typically 0.2 nT
per year in each sensor on C1 and negligible on C2, C3 and C4. |
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