Accession Number : AD0647794

Title :   RESEARCH WORKS RELATED TO SOLAR RADIO EMISSION AND V.L.F. PROPAGATION IN THE LOWER IONOSPHERE.

Descriptive Note : Annual rept., Jan-66-Jan 67,

Corporate Author : UNIVERSIDADE MACKENZIE SAO PAULO (BRAZIL) GRUPO DE RADIO-ASTRONOMIA

Personal Author(s) : Kaufmann,Pierre

Report Date : JAN 1967

Pagination or Media Count : 151

Abstract : Contents: Report on operations; On the installation of very low frequency tracking stations at umuarama radio observatory: description of the system and initial results; Discussion on D-region modifications during sudden ionospheric disturbances, measured on phase and amplitude at very low frequencies; Approximated calibration curves for the Sao Paulo V.L.F. tracking receivers; A short note on 20 May 1966 annular solar eclipse effects on VLF propagation path Criggion-Sao Paulo; Computation of average amplitude of V.L.F. transmissions; Comments on measuring methods with a new 7 GHz solar radio polarimeter: first results relative to solar activity from 30 October to 14 November 1966, including 12 November eclipse event; Relevant technical features of a new solar radio polarimeter working on 4.28-cm wavelength; Calculations of apparent sky temperatures and of tropospheric absorption on solar radiation at 4.28-cm wavelength; A description of trapped particle distribution at 900-km of altitude near the South Atlantic geomagnetic anomaly; Influence of zenith distance on atmospheric absorption due to water vapor and oxygen at the frequency of 17 GHz.

Descriptors :   (*SOLAR RADIATION, RADIO ASTRONOMY), (*EXTRATERRESTRIAL RADIO WAVES, SUN), (*IONOSPHERIC PROPAGATION, VERY LOW FREQUENCY), RADIO RECEIVERS, TRACKING, IONOSPHERIC DISTURBANCES, CALIBRATION, SOLAR ECLIPSES, MICROWAVES, EMISSIVITY, POLARIZATION, ABSORPTION, TROPOSPHERE, VAN ALLEN RADIATION BELT, WATER VAPOR, OXYGEN, BRAZIL

Subject Categories : Astrophysics
      Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE