The Relativistic Electron-Proton Telescope (REPT) Instrument on Board the Radiation Belt Storm Probes (RBSP) Spacecraft: Characterization of Earth’s Radiation Belt High-Energy Particle Populations

Baker, D. N.; Kanekal, S.; Hoxie, V. C.; Batiste, Susan N.; Bolton, M.; Li, X.; Elkington, S. R.; Monk, S.; Reukauf, Randy A.; Steg, Stephen R.; Westfall, J.; Belting, Chris; Bolton, B.; Braun, D.; Cervelli, B.; Hubbell, K.; Kien, M.; Knappmiller, S.; Wade, Salimata; Lamprecht, Bret; Stevens, K W H; Wallace, Janet; Yehle, A.; Spence, Harlan E.; Friedel, R. H. W.

doi:10.1007/s11214-012-9950-9

Cited by 399 publications

(448 citation statements)

References 54 publications

(54 reference statements)

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“…[11] The pitch angle resolved differential number flux data, j(E,˛), used in this study are from the REPT instrument [Baker et al, 2012]. We used the level 2 science data available from the ECT (Energetic Particle Composition and Thermal Plasma Suite) Science Operations Center calculated at 5 min cadence to improve the counting statistics.…”

Section: Methods and Datamentioning

confidence: 99%

Phase Space Density matching of relativistic electrons using the Van Allen Probes: REPT results

Morley

Henderson

Reeves

et al. 2013

Geophysical Research Letters

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[1] Phase Space Density (PSD) matching can be used to identify the presence of nonadiabatic processes, evaluate accuracy of magnetic field models, or to cross-calibrate instruments. Calculating PSD in adiabatic invariant coordinates requires a global specification of the magnetic field. For a well specified global magnetic field, nonadiabatic processes or inadequate cross calibration will give a poor PSD match. We have calculated PSD( , K) for both Van Allen Probes using a range of models and compare these PSDs at conjunctions in L* (for given , K). We quantitatively assess the relative goodness of each model for radiation belt applications. We also quantify the uncertainty in the model magnetic field magnitude and the related uncertainties in PSD, which has applications for modeling and particle data without concurrent magnetic field measurements. Using this technique, we show the error in PSD for an energy spectrum observed by the relativistic electron-proton telescope (REPT) is a factor of 1.2 using the TS04 model.

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Section: Methods and Datamentioning

confidence: 99%

Phase Space Density matching of relativistic electrons using the Van Allen Probes: REPT results

Morley

Henderson

Reeves

et al. 2013

Geophysical Research Letters

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“…We also calculated electron PSD in adiabatic coordinates using fluxes from the RBSP-ECT Relativistic Electron and Proton Telescopes (REPT) [Baker et al, 2012] instruments all measure the full pitch angle distributions throughout each spin of the spacecraft. To convert to PSD, pitch angle and energy resolved fluxes were fit to energy spectra at each time and converted to PSD as a function of energy by dividing by the corresponding relativistic momentum squared.…”

Section: Observationsmentioning

confidence: 99%

On the cause and extent of outer radiation belt losses during the 30 September 2012 dropout event

et al. 2014

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On 30 September 2012, a flux "dropout" occurred throughout Earth's outer electron radiation belt during the main phase of a strong geomagnetic storm. Using eight spacecraft from NASA's Time History of Events and Macroscale Interactions during Substorms (THEMIS) and Van Allen Probes missions and NOAA's Geostationary Operational Environmental Satellites constellation, we examined the full extent and timescales of the dropout based on particle energy, equatorial pitch angle, radial distance, and species. We calculated phase space densities of relativistic electrons, in adiabatic invariant coordinates, which revealed that loss processes during the dropout were > 90% effective throughout the majority of the outer belt and the plasmapause played a key role in limiting the spatial extent of the dropout. THEMIS and the Van Allen Probes observed telltale signatures of loss due to magnetopause shadowing and subsequent outward radial transport, including similar loss of energetic ring current ions. However, Van Allen Probes observations suggest that another loss process played a role for multi-MeV electrons at lower L shells (L* <~4).

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“…Probes A and B observed very similar features, due to the proximity of the two spacecraft during this day. We analyze the electron flux measurements from the Relativistic Electron Proton Telescope (REPT) [Baker et al, 2013] and the Magnetic Electron Ion Spectrometer (MagEIS) [Blake et al, 2013] of the Energetic Particle, Composition, and Thermal Plasma suite [Spence et al, 2013]. Since the calibration efforts on REPT remain ongoing, we use a simple linear adjustment factor in the instrument overlap region to match the flux observed by REPT with MagEIS and plot in Figure 3a both electron fluxes as a function of pitch angle.…”

Section: Geophysical Research Lettersmentioning

confidence: 99%

Investigation of EMIC wave scattering as the cause for the BARREL 17 January 2013 relativistic electron precipitation event: A quantitative comparison of simulation with observations

Millan

Hudson

et al. 2014

Geophysical Research Letters

135

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Electromagnetic ion cyclotron (EMIC) waves were observed at multiple observatory locations for several hours on 17 January 2013. During the wave activity period, a duskside relativistic electron precipitation (REP) event was observed by one of the Balloon Array for Radiation belt Relativistic Electron Losses (BARREL) balloons and was magnetically mapped close to Geostationary Operational Environmental Satellite (GOES) 13. We simulate the relativistic electron pitch angle diffusion caused by gyroresonant interactions with EMIC waves using wave and particle data measured by multiple instruments on board GOES 13 and the Van Allen Probes. We show that the count rate, the energy distribution, and the time variation of the simulated precipitation all agree very well with the balloon observations, suggesting that EMIC wave scattering was likely the cause for the precipitation event. The event reported here is the first balloon REP event with closely conjugate EMIC wave observations, and our study employs the most detailed quantitative analysis on the link of EMIC waves with observed REP to date.

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The Relativistic Electron-Proton Telescope (REPT) Instrument on Board the Radiation Belt Storm Probes (RBSP) Spacecraft: Characterization of Earth’s Radiation Belt High-Energy Particle Populations

Cited by 399 publications

References 54 publications

Phase Space Density matching of relativistic electrons using the Van Allen Probes: REPT results

Phase Space Density matching of relativistic electrons using the Van Allen Probes: REPT results

On the cause and extent of outer radiation belt losses during the 30 September 2012 dropout event

Investigation of EMIC wave scattering as the cause for the BARREL 17 January 2013 relativistic electron precipitation event: A quantitative comparison of simulation with observations

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