RELATIVISTIC ELECTRON ENHANCEMENTS - SIMULTANEOUS MEASUREMENTS FROM SYNCHRONOUS AND LOW ALTITUDE SATELLITES

被引：17

作者：

IMHOF, WL ^{[1
]}

VOSS, HD ^{[1
]}

MOBILIA, J ^{[1
]}

DATLOWE, DW ^{[1
]}

MCGLENNON, JP ^{[1
]}

BAKER, DN ^{[1
]}

机构：

[1] NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771

来源：

GEOPHYSICAL RESEARCH LETTERS | 1991年 / 18卷 / 03期

关键词：

D O I：

10.1029/91GL00132

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We present here for the first time simultaneous measurements of trapped relativistic electron enhancements at synchronous altitude and precipitating electrons in the bounce loss cone at low altitudes. The measurements show that the daily variations in the precipitation flux for L > 5 correlated well with the daily variations in the total flux at high altitude, both with respect to sudden enhancements as well as flux depletions. The daily averaged precipitating flux (E > 1 MeV) at L = 6.1 to 7.1 was about 0.3 percent of the daily averaged directional flux (E greater-than-or-equal-to 1.5 MeV) observed at synchronous altitude, whereas within narrow spikes the precipitating directional fluxes were often within a factor of 10 of the daily averaged trapped fluxes. Strong depletions in the synchronous altitude greater-than-or-equal-to 1.5 MeV electron intensities are shown to be associated with low altitude measurements of the equatorward movement of precipitating spikes to lower L shells.

引用

页码：397 / 400

页数：4

共 7 条

[1] Relativistic magnetospheric electrons. Lower ionospheric conductivity and long-term atmospheric variability [J].