Longitudinal differences in electron precipitation near L = 4

Details Longitudinal differences in electron precipitation near L = 4 Longitudinal differences in electron precipitation near L = 4

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9311385b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Oct. 1, 1988, p. 11385-11403.

Computer Science

Sound

9

Antarctic Regions, Electron Precipitation, Longitude, Radiation Measurement, Anomalies, Indian Ocean, Rocket Sounding, Time Response, Very Low Frequencies, X Ray Apparatus

Scientific paper

The origin of the significant differences revealed in data on electron precipitation characteristics obtained above Siple Station, Antarctica, and Kerguelen Islands was investigated. The two stations are both in the Southern Hemisphere at nearly the same magnetic latitude (L=4) and at longitudes that place them roughly at equal distances east and west of the center of the South Atlantic magnetic anomaly. The primary data used in the study were counting rates from rocket-borne parachute-deployed scintillation counters and VLF data from ground-based and rocket-borne receivers. The two locations were found to differ in two major respects: (1) the precipitation background at Kerguelen Islands is very low, with high levels of wave activity being required to produce any detectable precipitation, and (2) X-ray microbursts, very common at Siple, were found to be essentially absent at Kerguelen. This observation supports models of the microburst generation process which predict maximum pitch angle scatterings of only a few tenths of a degree.

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