Accession Number : AD0887903

Title :   Solar Flare Effects on Short-Path VLF Ionospheric Soundings.

Descriptive Note : Research and development rept. May 67-Sep 70,

Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CALIF

Personal Author(s) : Noonkester,V. R.

Report Date : 25 MAY 1971

Pagination or Media Count : 45

Abstract : Examination of the effects of 10 solar flares on near-vertical-incidence vlf soundings shows change with flare, probing vlf radio frequency, polarization of downcoming wave, and direction of propagation relative to geomagnetic field. A single consistent feature was noted, namely that an increase in relative propagation time never occurred during the onset of a flare. The variation from flare to flare is evidently predominately the result of variation in the x-ray spectra. (Author)

Descriptors :   (*IONOSPHERIC DISTURBANCES, SOLAR FLARES), ATMOSPHERIC SOUNDING, VERY LOW FREQUENCY, IONOSPHERIC PROPAGATION, SCIENTIFIC SATELLITES, SOLAR RADIATION, X RAYS

Subject Categories : Astrophysics
      Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE