Noise features of the CHAMP vector magnetometer in the 1–25 Hz frequency range

CHAMP (CHAllenging Minisatellite Payload), a German small satellite mission to study the Earth's gravity field, magnetic field and upper atmosphere, ended in space on 19 September 2010. Among them the high-resolution vector magnetic field data, provided by the FGM (FluxGate vector Magnetometer)...

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Published inSensors and actuators. A. Physical. Vol. 222; pp. 272 - 283
Main Authors Yin, Fan, Lühr, Hermann, Park, Jaeheung, Rauberg, Jan, Michaelis, Ingo
Format Journal Article
LanguageEnglish
Published 01.02.2015
Subjects
Disturbances
Frequency ranges
Functionally gradient materials
Magnetic fields
Mathematical analysis
Noise
Small satellites
Vectors (mathematics)
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Summary:CHAMP (CHAllenging Minisatellite Payload), a German small satellite mission to study the Earth's gravity field, magnetic field and upper atmosphere, ended in space on 19 September 2010. Among them the high-resolution vector magnetic field data, provided by the FGM (FluxGate vector Magnetometer) at 50 Hz sample rate, are one of the most important data products. The 50 Hz data allows us to investigate all signals from DC to 25 Hz. Here we report on noise features found in the frequency range above 1 Hz. There are predominantly three types of disturbances found regularly in the vector magnetic field data. One is at ~2.1 Hz and harmonic signals, an other is an 8 Hz single frequency signal. The features of these two signals are characterized and analyzed, which helps us to trace the signals to the source of disturbance. The amplitudes of all these noise features are generally below 50 pT.
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ISSN:0924-4247
DOI:10.1016/j.sna.2014.12.024