Accession Number : AD0679774

Title :   3.4- AND 1.4-MM OBSERVATIONS OF THE LUNAR ECLIPSE ON 18 OCTOBER 1967.

Descriptive Note : Rept. for Sep 67-Jun 68,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Reber,Earl E. ; Stacey,Joseph M.

Report Date : OCT 1968

Pagination or Media Count : 21

Abstract : Radiometric measurements of selected lunar areas are reported for the lunar eclipse of 18 October 1967. Observations were made simultaneously at 3.4- and 1.4-mm wavelength with half-power antenna beamwidths of 3.3 arc min and 1.78 arc min, respectively. Temperature changes and cooling rates observed at 3.4 mm are in good agreement with the temperature changes measured on the same areas observed at 3.2 mm during the 30 December 1963 lunar eclipse. Within the precision of the measurements, as limited by atmospheric variations and radiometer noise, there is no statistically significant difference in the cooling rates between any two observed lunar areas at 3.4 mm. Similarly, there is no statistically significant difference between the cooling rates between any two lunar areas measured at 1.4 mm. The 3.4-mm observations of the 18 October 1967 eclipse are compared with the 3.2-mm observations of the 30 December 1963 eclipse. The same lunar areas were measured during both eclipse events (Copernicus, Mare Serenitatis, and a mountainous region). (Author)

Descriptors :   (*LUNAR ECLIPSES, *RADIO ASTRONOMY), COOLING, TEMPERATURE, PERIODIC VARIATIONS, MILLIMETER WAVES, BRIGHTNESS, MEASUREMENT, STATISTICAL ANALYSIS, MICROWAVE FREQUENCY, SURFACE TEMPERATURE

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE