BRIGHTNESS TEMPERATURES OF THE QUIET SUN AND THE NEW MOON AT 3.3- AND 5. 7-MM WAVELENGTHS
AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
Pagination or Media Count:
Absolute brightness temperatures and brightness temperature ratios of the quiet sun and the center of the new moon were measured at the 3.3-mm wavelength and at several wavelengths in the 5.7-mm region. Radiometric maps of the sun and new moon are used to illustrate the problems associated with brightness temperature measurements of these sources. Measured quiet-sunnew- moon brightness temperature ratios and reported central brightness temperatures of the new moon in the millimeter wavelength region confirm the measured absolute brightness temperatures of the quiet sun. Reported solar brightness temperatures in the 5.7- to 1.0-mm wavelength interval are tabulated and presented graphically as a function of frequency and wavelength. The regression- line equation computed for the reported measurements is given for estimating solar brightness temperatures at any wavelength in this interval and is solved for the wavelengths of the reported measurements.