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Accession Number:
AD0275176
Title:
The Investigation of Solar Emission and the Attenuation and Emission of the Earth's Atmosphere at the Frequencies of 69.75 and 94.0 KMCS.
Descriptive Note:
Corporate Author:
TEXAS UNIV AUSTIN ELECTRICAL ENGINEERING RESEARCH LAB
Report Date:
1962-03-31
Pagination or Media Count:
1.0
Abstract:
The development of a millimeter radiometer for solar observations and the use of this radiometer at frequences of 69.75 kmc and 94.0 kmc are described. Observations were made between 20 July 1 1 a 5 rch 1962. The mean temperatures of the central area of the solar disc were 7100 K and 7860 K for the frequencies of 69.75 and 94.0 kmc, respectively. The average temperature deviations of the western and eastern areas relative to the ce tr l are s ere -0.1 nd 0.1, respectively. Radio telescope measurements yielded information on the emission and the absorption of the radio waves by the earths atmosphere. The attenuations due to oxygen were 1.8 db and 0.5 db for the two frequencies, respectively, and the attenuation for water vapor based on grams in a square centimeter column through the atmosphere were 0.17 db and 0.26 db for the two frequencies, respectively. The attenuation in a standard atmo phere was found to be 2.00 db at 69.75 kmc and 1.00 db at 94.0 kmc. The emission temperatures due to oxygen were 22 K and 116 K, and the temperatures due to oxygen plus water vapor were 112 K and 127 K for the frequencies of 69.75 and 94.0 kmc, respectively. Author
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
