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Record Details

Record 60 of 100543
Investigation of S3-2 satellite data for local time variation of energetic electron precipitation
External Online Source: doi:10.1029/93JA01853
Author and Affiliation:
Robbe, S.(University of Houston, Houston, TX, United States)
Sheldon, W. R.(University of Houston, Houston, TX, United States)
Benbrook, J. R.(University of Houston, Houston, TX, United States)
Bering, E. A.(University of Houston, Houston, TX, United States)
Vampola, A. L.(The Aerospace Corporation, Los Angeles, CA, United States)
Abstract: Data on precipitating electrons from the S3-2 satellite were investigated for local time variation at four L = 4 stations in the southern hemisphere. The equatorial pitch angles of electrons mirroring at 100 km, assumed to be the edge of the bounce loss cone, are calculated for L = 4 using the International Geomagnetic Reference Field for the epoch of the S3-2 data, along with the variation in mirror altitude per degree of equatorial pitch angle. The largest obstacle to the investigation was uneven sampling in terms of local time for all of the stations. However, this situation was improved upon by the use of S3-2 measurements at the conjugate locations of the four stations which provided additional data on electrons in the southern hemisphere bounce loss cone. Evidence for an effect of the dawn-to-dusk geoelectric field was found at two of the stations, Halley Bay and Siple, in the form of a minimum in electron precipitation at dusk. However, the present study does not completely resolve the question of local time modulation of electron precipitation at L = 4 in the southern hemisphere. Furthermore, while the average precipitation was lowest at the Kerguelen site, as would be expected on the basis of drift loss cone (DLC) theories, the intensity at that site exceeds the level that is expected on the basis of these DLC theories.
Publication Date: Mar 01, 1994
Document ID:
19950037053
(Acquired Dec 28, 1995)
Accession Number: 95A68652
Subject Category: GEOPHYSICS
Document Type: Journal Article
Publication Information: Journal of Geophysical Research; p. p. 3845-3854; (ISSN 0148-0227); 99; A3
Publisher Information: United States
Contract/Grant/Task Num: F04701-75-C-0076; F04701-78-C-0079; NAG9-213
Financial Sponsor: NASA; United States
Organization Source: NASA Johnson Space Center; Houston, TX, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: EARTH IONOSPHERE; ELECTRON PRECIPITATION; HIGH ENERGY ELECTRONS; SOUTHERN HEMISPHERE; TIME FUNCTIONS; MAGNETIC FIELD CONFIGURATIONS; SATELLITE OBSERVATION
Imprint And Other Notes: Journal of Geophysical Research vol. 99, no. A3 p. 3845-3854 March 1, 1994
Miscellaneous Notes: Research sponsored by the Texas Advanced Research Program
Availability Source: Other Sources
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