Evolution of relativistic outer belt electrons during extended quiescent period
885 keV
2.0 MeV
2.3 MeV
Slow decay of electrons during quiet time
730 keV
Using CSSWE Cubesat LEO electron fluxes with electron
lifetime loss model to estimate loss due to precipitation
Compare loss model results to REPT & MagEIS fluxes (~0.5 2.5 MeV) to determine net loss effect on outer radiation
belt content
Additonally, show REPT & MagEIS calculated phase space
density to show loss does not result from m’pause
shadowing
Using EFW Hiss and Chorus wave data to suggest
mechanism for precipitation loss
Presented preliminary results at 2013 GEM meeting;
submitting full results to GRL Special Issue, Nov 2013
Same loss seen in CSSWE Cubesat
CSSWE REPTile Electron Flux, E=0.5-1.7 MeV
Pressure (nPa)
Density (N/cm−3)
DST
Velocity (km/s)
Dst index (nT)
Bz (nT)
Geomagnetically quiet conditions
5
0
−5
20
10
500
300
4
2
6
60
4
40
0
−20
2
20
−40
00
16 Dec
21 Dec
26 Dec
31 Dec
05 Jan
10 Jan
15 Jan
Kp index
20
CSSWE Cubesat
measures trapped,
quasi-trapped and
precipitating populations
PSD vs. L*
10−4
f [(c/MeV/cm)3]
400
10−5
10−6
Orbit
Orbit
Orbit
Orbit
Orbit
Orbit
290
290
293
293
296
296
700 (+/− 50) [MeV/G]
µ=
MagEIS−A 846−3869 keV
Inbound
Outbound
Inbound
Outbound
Inbound
Outbound
10−7
10−8
10−9
2
3
4
L*
5
6
Allison Jaynes, X. Li, Q. Schiller, L. Blum, W. Tu, D. Malaspina, D. Turner, D. Baker, S. Kanekal, B. Blake, J. Wygant