Accession Number : AD0718376

Title :   Asymmetric Access of Energetic Solar Protons to the Earth's North and South Polar Caps,

Corporate Author : IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Van Allen,J. A. ; Fennell,J. F. ; Ness,N. F.

Report Date : DEC 1970

Pagination or Media Count : 40

Abstract : During the energetic solar particle event that began on January 24, 1969, the ratio N/S of the intensity of protons E sub p > 0.3 MeV over the earth's north (N) polar cap (lambda > 80 degrees) to that over its south (S) polar cap (negative lambda > 80 degrees) varied from a value greater than 20 to about 1, as observed with satellite Injun 5 in a low altitude polar orbit. The present report is concerned with observations by three different spacecraft during the solar particle event that began on January 24, 1969. The results are much clearer than earlier ones by virtue of the extraordinarily strong anisotropy of interplanetary particle intensity early in this event and the comprehensiveness of the observations. (Author)

Descriptors :   (*SOLAR RADIATION, PROTONS), (*COSMIC RAYS, POLAR REGIONS), GEOMAGNETISM, MAGNETIC FIELDS, VAN ALLEN RADIATION BELT, ALPHA PARTICLES, SCIENTIFIC SATELLITES

Subject Categories : Astrophysics
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE