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2014

Characteristics of precipitating energetic electron fluxes relative to the plasmapause during geomagnetic storms

n this study we investigate the link between precipitating electrons from the Van Allen radiation belts and the dynamical plasmapause. We consider electron precipitation observations from the Polar Orbiting Environmental Satellite (POES) constellation during geomagnetic storms. Superposed epoch analysis is performed on precipitating electron observations for the 13 year period of 1999 to 2012 in two magnetic local time (MLT) sectors, morning and afternoon. We assume that the precipitation is due to wave-particle interactions ...

Whittaker, Ian; Clilverd, Mark; Rodger, Craig;

YEAR: 2014     DOI: 10.1002/2014JA020446

energetic electron precipitation; Plasmapause; POES

The effects and correction of the geometric factor for the POES/MEPED electron flux instrument using a multisatellite comparison

Measurements from the Polar-Orbiting Environmental Satellite (POES) Medium Energy Proton and Electron Detector (MEPED) instrument are widely used in studies into radiation belt dynamics and atmospheric coupling. However, this instrument has been shown to have a complex energy-dependent response to incident particle fluxes, with the additional possibility of low-energy protons contaminating the electron fluxes. We test the recent Monte Carlo theoretical simulation of the instrument by comparing the responses against observati ...

Whittaker, Ian; Rodger, Craig; Clilverd, Mark; Sauvaud, \;

YEAR: 2014     DOI: 10.1002/2014JA020021

DEMETER; energetic electron flux; geometric factor; POES; Radiation belts

2013

Determining the spectra of radiation belt electron losses: Fitting DEMETER electron flux observations for typical and storm times

The energy spectra of energetic electron precipitation from the radiation belts are studied in order to improve our understanding of the influence of radiation belt processes. The Detection of Electromagnetic Emissions Transmitted from Earthquake Regions (DEMETER) microsatellite electron flux instrument is comparatively unusual in that it has very high energy resolution (128 channels with 17.9 keV widths in normal survey mode), which lends itself to this type of spectral analysis. Here electron spectra from DEMETER have been ...

Whittaker, Ian; Gamble, Rory; Rodger, Craig; Clilverd, Mark; Sauvaud, \;

YEAR: 2013     DOI: 10.1002/2013JA019228

DEMETER; electron spectral fit; Radiation belts



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