POES MEPED differential flux retrievals and electron channel

Details of Research

TitlePOES MEPED differential flux retrievals and electron channel contamination correctionAbstractA correction method to remove proton contamination from the electron channels of the Polar-orbiting Operational Environmental Satellites Medium Energy Proton/Electron Detector (MEPED) is described. Proton contamination estimates are based on measurements in five of the MEPED proton spectral channels. A constrained inversion of the MEPED proton channel response function matrix is used to calculate proton differential flux spectra. In this inversion, the proton energy distribution is described by a weighted combination of exponential, power law, and Maxwellian distributions. Proton contamination in the MEPED electron spectral channels is derived by applying the electron channel proton sensitivities to the proton fluxes from the best fit proton spectra. Once the electron channel measurements are corrected for proton contamination, an inversion of the electron channel response function matrix is used to calculate electron differential flux spectra. A side benefit of the method is that it yields an estimate for the integrated electron flux in the energy range from 300 keV to 2.5 MeV with a center energy at 800 keV. The final product is a differential spectrum of electron flux covering the energy range from about 10 keV to 2.5 MeV that is devoid of proton contamination except during large solar proton events. Comparisons of corrected MEPED differential fluxes to the Detection of Electromagnetic Emissions Transmitted from Earthquake Regions Instrument for Detecting Particles show that MEPED fluxes are greater than what is expected from altitude-induced particle population changes; this is attributed at least partially to measurement differences in pitch angle range. Key Points A new set of POES MEPED data is produced with proton contamination removed Differential flux for medium-energy protons and electrons is calculated New quantitative relativistic electron channel is output Â©2015. American Geophysical Union. All Rights Reserved.

Details

1st AuthorPeck, E. AuthorPeck, E.Randall, C.Green, J.Rodriguez, J.Rodger, C.Year2015JournalJournal of Geophysical Research A: Space PhysicsVolume120Number6Pages4596-4612DOI10.1002/2014JA020817URLhttps://www.scopus.com/inward/recor.....7c1ee4f6e5f6a9cb931ba59a7PublisherBlackwell Publishing LtdAuthor KeywordsMEEMEPEDPOES

Other

CitationPeck, E., Randall, C., Green, J., Rodriguez, J. and Rodger, C. (2015). POES MEPED differential flux retrievals and electron channel contamination correction. Journal of Geophysical Research A: Space Physics, 120(6):4596-4612

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