Radiometric Measurements of Slant Path Attenuation in the V/W Bands

Abstract

Slant path brightness temperatures were measured at 72.5 and 82.5 GHz with a multi-channel radiometer. One year of measurements collected at 36 degree elevation angle in Rome, NY were examined in terms of attenuation statistics. A model-based attenuation retrieval algorithm was developed to determine the slant path attenuation cumulative distribution function to over 20 dB of attenuation corresponding to less than 1% exceedance probability. Slant path attenuation was also measured with the radiometer using the sun as a source of radiation. Over 30 dB of attenuation dynamic range was possible with this technique. Sun-beacon measurements were used to test model predictions.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2014
Accession Number
ADA610427

Entities

People

  • George Brost
  • Kevin Magde
  • William Cook

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Algorithms
  • Attenuation
  • Brightness
  • Cell Size
  • Dynamic Range
  • Elevation
  • Frequency
  • Information Science
  • Measurement
  • Radiative Transfer
  • Radiometers
  • Satellite Communications
  • Statistics
  • Surface Temperature
  • W Band

Fields of Study

  • Physics

Readers

  • Radar Systems Engineering.
  • Regression Analysis.