J. Space Weather Space Clim.
Volume 6, 2016
|Number of page(s)||15|
|Published online||07 June 2016|
Space Weather impact on the degradation of NOAA POES MEPED proton detectors
Birkeland Centre for Space Science (BCSS), Department of Physics and Technology, University of Bergen, Allégaten 55, N-5007
* Corresponding author: firstname.lastname@example.org
Accepted: 12 May 2016
The Medium Energy Proton and Electron Detector (MEPED) on board the National Oceanic and Atmospheric Administration Polar Orbiting Environmental Satellites (NOAA POES) is known to degrade with time. In recent years a lot of effort has been put into calibrating the degraded proton detectors. We make use of previous work and show that the degradation of the detectors can be attributed to the radiation dose of each individual instrument. However, the effectiveness of the radiation in degrading the detector is modulated when it is weighted by the mean ap index, increasing the degradation rate in periods with high geomagnetic activity, and decreasing it through periods of low activity. When taking ap and the radiation dose into account, we find that the degradation rate is independent of spacecraft and detector pointing direction. We have developed a model to estimate the correction factor for all the MEPED detectors as a function of accumulated corrected flux and the ap index. We apply the routine to NOAA POES spacecraft starting with NOAA-15, including the European satellites MetOp-02 and MetOp-01, and estimate correction factors.
Key words: Proton detector degradation / Space Weather / Calibration / MEPED / NOAA POES
© L.-K.G. Ødegaard et al., Published by EDP Sciences 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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