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.
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