Other
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.1211i&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Feb. 1, 1987, p. 1211-1217. Research sponsored by the Lockheed Indepe
Other
4
Bremsstrahlung, Electron Precipitation, Solar Terrestrial Interactions, Spatial Distribution, Sudden Storm Commencements, X Rays, Magnetic Storms, Satellite-Borne Instruments, Spectral Energy Distribution, Temporal Distribution
Scientific paper
For the first time, remote bremsstrahlung X-ray spatial, temporal, and spectral mappings from a satellite are presented for a strong energetic electron precipitation event following a sudden commencement. After the sudden commencement of July 13, 1982, and at the beginning of a magnetospheric substorm, X-rays were observed over a period of more than 4 min from the P78-1 spacecraft at 600-km altitude. The X-rays above 21 keV were emitted over a magnetic local time (MLT) interval spanning 6 hours. Five precipitating temporal spikes were observed with coherency over wide longitude intervals of 3 hours or more in MLT near midnight. The energy spectra over broad longitude intervals tended to be harder simultaneously at the times of greatest X-ray intensity. The power input to the atmosphere from precipitating electrons that produced the X-rays emitted within 220-2230 MLT is estimated to have reached values of 5 x 10 to the 16th ergs/s over an area of about 30,000 sq km, leading to an average energy deposition rate of about 160 ergs/sq cm s. The precipitation inputs at other magnetic local times displayed nearly simultaneous sharp maxima in time but with lower power inputs.
Datlowe Dayton W.
Imhof William L.
Mobilia Joseph
Voss Henry D.
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