Reflectivity of Sea Surface For Doppler Radar.

Abstract

Measurements were made of the reflectivity of the sea surface using a Doppler type radar. It was found that the reflected energy decreased rapidly when the transmission angle from the vertical exceeded l5 degrees. In one case the loss at 20 degrees was 65 db greater than the theoretical loss for a perfect plane reflector at normal incidence. Measurements of the Doppler frequency returned by the moving water surface indicate that high accuracies are improbable in a Doppler ground speed indicator used at low speed.

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Document Details

Document Type
Technical Report
Publication Date
Feb 16, 1949
Accession Number
ADA305028

Entities

People

  • E. F. Mcclain
  • W. R. Ferris

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Air Force Facilities
  • Aircrafts
  • Altitude
  • Doppler Radar
  • Doppler Systems
  • Errors
  • Frequency
  • Ground Speed
  • Ground Speed Indicators
  • Indicators
  • Measurement
  • Military Research
  • Navigational Equipment
  • Radar
  • Radial Velocity

Fields of Study

  • Environmental science
  • Physics

Readers

  • Acoustical Oceanography.
  • Radar Systems Engineering.
  • Systems Analysis and Design