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):

Report Date:

1967-01-01

Pagination or Media Count:

151.0

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.

Subject Categories:

  • Astrophysics
  • Atmospheric Physics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE