A background correction algorithm for Van Allen Probes MagEIS electron flux measurements

被引：92

作者：

Claudepierre, S. G. ^{[1
]}

O'Brien, T. P. ^{[1
]}

Blake, J. B. ^{[1
]}

Fennell, J. F. ^{[1
]}

Roeder, J. L. ^{[1
]}

Clemmons, J. H. ^{[1
]}

Looper, M. D. ^{[1
]}

Mazur, J. E. ^{[1
]}

Mulligan, T. M. ^{[1
]}

Spence, H. E. ^{[2
]}

Reeves, G. D. ^{[3
]}

Friedel, R. H. W. ^{[3
]}

Henderson, M. G. ^{[3
]}

Larsen, B. A. ^{[3
]}

机构：

[1] Aerosp Corp, Dept Space Sci, El Segundo, CA 90245 USA

[2] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA

[3] Los Alamos Natl Lab, Space & Atmospher Sci Grp, Los Alamos, NM USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2015年 / 120卷 / 07期

关键词：

radiation belt; inner radiation belt; background contamination; spacecraft engineering; outer radiation belt; particle measurements; RELATIVISTIC ELECTRONS; ENERGETIC PARTICLE; RADIATION BELT; ENVIRONMENT;

D O I：

10.1002/2015JA021171

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe an automated computer algorithm designed to remove background contamination from the Van Allen Probes Magnetic Electron Ion Spectrometer (MagEIS) electron flux measurements. We provide a detailed description of the algorithm with illustrative examples from on-orbit data. We find two primary sources of background contamination in the MagEIS electron data: inner zone protons and bremsstrahlung X-rays generated by energetic electrons interacting with the spacecraft material. Bremsstrahlung X-rays primarily produce contamination in the lower energy MagEIS electron channels (approximate to 30-500keV) and in regions of geospace where multi-MeV electrons are present. Inner zone protons produce contamination in all MagEIS energy channels at roughly L < 2.5. The background-corrected MagEIS electron data produce a more accurate measurement of the electron radiation belts, as most earlier measurements suffer from unquantifiable and uncorrectable contamination in this harsh region of the near-Earth space environment. These background-corrected data will also be useful for spacecraft engineering purposes, providing ground truth for the near-Earth electron environment and informing the next generation of spacecraft design models (e.g., AE9).

引用

页码：5703 / 5727

页数：25

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