Accession Number : AD0778932

Title :   On the Access of Solar Protons to the Synchronous Altitude Region.

Descriptive Note : Rept. for 1 Aug-1 Dec 73,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Blake,J. Bernard ; Martina,E. Frank ; Paulikas,George A.

Report Date : 15 MAY 1974

Pagination or Media Count : 27

Abstract : Observations of 10-90 MeV solar protons were made near the synchronous altitude around the time of a sudden commencement at 0037 UT on 9 August 1972 using sensors aboard 1970-93A and 1972-10A. The observations indicated that the solar protons had direct access to the synchronous altitude region through the dawn flank of the magnetosphere and were transiently trapped with an e-folding lifetime of a few drift periods. A weaker dependence of the cutoff energy upon local time was observed than was predicted by the calculations of Gall et al. (1971a, 1971b). (Author)

Descriptors :   *Magnetosphere, *Solar cosmic rays, *Protons, Ionospheric disturbances, Scientific satellites

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE