Accession Number : AD0811486

Title :   OBSERVATIONS OF THE SOLAR PARTICLE EVENT OF 5 TO 12 FEBRUARY 1965 WITH MARINER IV AND INJUN IV,

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

Personal Author(s) : Krimigis, S. M. ; Van Allen, J. A.

Report Date : FEB 1967

Pagination or Media Count : 47

Abstract : The solar cosmic ray event of 5-12 February 1965 is the most intense one of a ten month period of interplanetary observation (28 November 1964 - 30 September 1965) with Mariner 4 during the recent epoch of minimum solar activity. A full time history of the intensities of energetic particles is presented from onset at 1835 + or - 10 U.T. on 5 February following a 2(+) solar flare N08, W25 (which began at 1750 U.T.) until disappearance into the background near the end of 12 February. A mixture of low energy protons E sub p > 0.5 MeV and electrons E sub e > keV is identified in this event for the first time.

Descriptors :   (*SOLAR RADIATION, MEASUREMENT), (*SCIENTIFIC SATELLITES, SOLAR RADIATION), (*COSMIC RAYS, MEASUREMENT), SOLAR FLARES, DIURNAL VARIATIONS, PERIODIC VARIATIONS, PROTONS, ENERGY, ORBITS, TIME, ELECTRONS, MARS PROBES.

Subject Categories : Astrophysics
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE