Accession Number : AD0687395

Title :   ELECTRON-CONTENT VARIATIONS AND CHANGE RATES OBTAINED DURING THE SPRING AND SUMMER OF 1967 BY THE MEASUREMENT OF FARADAY ROTATION OF 137-MHZ RADIO WAVES TRANSMITTED FROM ATS-1.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Goodman,John M. ; Lehman,Melvin W. ; Piernik,Edward

Report Date : 17 MAR 1969

Pagination or Media Count : 27

Abstract : Vhf radiowave transmissions (137.350 MHz) from the geostationary satellite ATS-1 (1966-110A) have been analyzed to determine the electron-content variations during the Spring and Summer of 1967. The regularities of the ionosphere during the observation period were found to be roughly the same as those which were observed during the Early Bird observation period of 1965. In particular it was found that there exist two extremal regions of the content-change rate function--one associated with sunrise and one associated with sunset. Irregularities in the electron content were observed to occur during both magnetically quiet and disturbed days, although extremely dramatic enhancements were recorded following two magnetic storms. Although a Chapman distribution is barely justifiable theoretically, it was found that the diurnal excursion is roughly proportional to the diurnal excursion in the square of f0F2 as predicted by simple Chapman theory. (Author)

Descriptors :   (*IONOSPHERE, ELECTRON DENSITY), DIURNAL VARIATIONS, MEASUREMENT, MAGNETOOPTICS, METEOROLOGICAL SATELLITES, RADIO WAVES, VERY HIGH FREQUENCY, MEASUREMENT, SYNCHRONOUS SATELLITES, RADIO TRANSMISSION

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE