Accession Number : AD0410218

Title :   EFFECT OF THE SUN UPON ANTENNA TEMPERATURE

Corporate Author : PHILCO CORP PALO ALTO CA

Personal Author(s) : Giddis, Albert R.

PDF Url : AD0410218

Report Date : MAR 1963

Pagination or Media Count : 106

Abstract : This report presents results of a study on com putations by means of analytical models of the quiet sun and, from measurements of its flux density, the effect of solar radiation upon an tenna noise temperature. The spatial and spectral properties of solar radio noise are described, and brightness temperature distributions over the sun at several frequencies are presented. The method by which antenna temperature is evaluated, using the Philco 2000 computer, is discussed. The computations are systematized, integrated, and compared with antenna temperatures contributed by other extraterrestrial sources. In addition, the effect of the earth's atmosphere and ground on the total noise temperature is determined. These results are used to calculate the variation of carrier-to-noise ratio as an antenna scans toward the sun while receiving signals from a deep-space probe and from a random-orbit satellite.

Descriptors :   *HEAT TRANSFER, *TEMPERATURE, *SATELLITE ANTENNAS, *SOLAR RADIATION, MATHEMATICAL MODELS, S BAND, RADIO ASTRONOMY, FLUX DENSITY, SUN, COMPUTER PROGRAMMING, STATISTICS, TABLES(DATA)

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE