Accession Number : AD0713114

Title :   BRIGHTNESS TEMPERATURES OF THE QUIET SUN AND NEW MOON AT THE 6-MM WAVELENGTH.

Descriptive Note : Rept. for May 69-Mar 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Reber,E. E.

Report Date : 11 SEP 1970

Pagination or Media Count : 34

Abstract : Absolute brightness temperatures and brightness temperature ratios of a quiet region near the center of the solar disk and the central region of the new moon were measured simultaneously at the 6-mm wavelength. The measured quiet sun/new moon brightness temperature ratios and reported central brightness temperatures of the new moon confirm the measured brightness temperature of the quiet sun at the 6-mm wavelength. Reported central brightness temperatures of the new moon are tabulated and graphed as a function of frequency and wavelength. The equation of a linear regression line for the reported measurements is given for estimating the brightness temperature of the new moon at any millimeter wavelength. Estimated brightness temperatures of the new moon and measured quiet sun/new moon ratios are used to estimate solar brightness temperatures at several millimeter wavelengths. The solar brightness temperatures, the regression line, and the Van de Hulst theoretical model are presented graphically as a function of frequency and wavelength. The regression line equation is given for estimating solar brightness temperatures at any wavelength in the 6- to 1-mm wavelength interval and is solved for the wavelength of the measured ratios. (Author).

Descriptors :   (*SOLAR RADIATION, MILLIMETER WAVES), (*MOON, MILLIMETER WAVES), SURFACE TEMPERATURE, MAPPING, RADIOMETERS, BRIGHTNESS

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE