Accession Number : AD0700752

Title :   THE 3.3-MM BRIGHTNESS DISTRIBUTION OF THE QUIET SUN.

Descriptive Note : Rept. for Jun 64-Jun 66,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Shimabukuro,Fred I.

Report Date : 01 DEC 1969

Pagination or Media Count : 25

Abstract : Center-to-limb brightness distribution measurements of the quiet sun at a wavelength of 3.3 mm show that there is a slight limb brightening at this wavelength. Within the measurement accuracy of the system used, the limb brightening function is only radially dependent. At 3.3 mm, the measurements are consistent with a solar brightness curve that is flat to about r = 0.8 with a rapid increase to a peak value of about 1.3 at the limb. The results show that most of the central disk 3.3-mm emission comes from a thin layer of relatively constant temperature about 1500 to 3500 km above the photosphere. (Author)

Descriptors :   (*CHROMOSPHERE, *EXTRATERRESTRIAL RADIO WAVES), (*SOLAR RADIATION, MILLIMETER WAVES), BRIGHTNESS, DISTRIBUTION FUNCTIONS, MICROWAVE SPECTROSCOPY, SURFACE TEMPERATURE, MATHEMATICAL MODELS

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE