HIGH ALTITUDE X-BAND NOISE MEASUREMENTS

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.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0404504

Entities

People

  • A. S. Orange
  • K. Glick
  • S. Hunt

Organizations

  • Air Force Cambridge Research Laboratories

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Aircraft Noise
  • Aircrafts
  • Altitude
  • Cloud Cover
  • Data Reduction
  • Electronic Equipment
  • Elevation
  • Equations
  • Frequency
  • High Altitude
  • Measurement
  • Puerto Rico
  • Tanker Aircraft
  • United States
  • X Band

Readers

  • Acoustics.
  • Phased Array Antenna Design.
  • Spectroscopy.