Accession Number:

AD0404504

Title:

HIGH ALTITUDE X-BAND NOISE MEASUREMENTS

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Personal Author(s):

Report Date:

1963-04-01

Pagination or Media Count:

40.0

Abstract:

Presented are X-band noise temperature data obtained with an airborne radiometer installed in a high-speed jet aircraft KC-135. The aircraft was found to be an electrically quiet environment at X-band. The data show the considerable influence of blackbody radiation from the earth entering the antenna sidelobes. Temperatures close to those calculated theoretically were measured over water and at high antenna elevation angles. Heavy clouds, though many thousands of feet below the aircraft, caused a consider able temperature increased. A trend of lower temperatures with increasing altitude was observed. The apparent temperatures of land, snow, and ice and water are discussed.

Subject Categories:

  • Radiofrequency Wave Propagation
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE