Accession Number : AD0734390

Title :   Electron-Production Rate of Solar and Galactic Cosmic Rays in the Lower Ionospheric D-Region.

Descriptive Note : Research and development rept. Aug 69-Jun 70,

Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CALIF

Personal Author(s) : Argo,Paul E.

Report Date : 11 AUG 1971

Pagination or Media Count : 30

Abstract : The heavy-ion component of galactic cosmic rays is found to yield an electron-production rate approximately one-half the magnitude of the proton component. At high altitudes, variations in the cut-off energy level in the middle and high geomagnetic latitudes (physically caused by geomagnetic storms) have a large effect on the electron-production rate of galactic cosmic rays (especially in the transition region between cut-off and no effective cut-off(approximately 68 degrees)); in the 30-to-60-km altitude region, however, electron production is not significantly affected. Solar protons can cause an abnormally high electron-production rate (at high latitudes) to all depths of the ionosphere, indicating a large effect on VLF reflection during solar particle storms. (Author)

Descriptors :   (*IONOSPHERE, COSMIC RAYS), (*COSMIC RAYS, ELECTRONS), MAGNETIC STORMS, PROTONS, SOLAR DISTURBANCES, EXTRATERRESTRIAL RADIO WAVES, VERY LOW FREQUENCY

Subject Categories : Astrophysics
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE