Accession Number : ADA305028

Title :   Reflectivity of Sea Surface For Doppler Radar.

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : McClain, E. F. ; Ferris, W. R.

PDF Url : ADA305028

Report Date : 16 FEB 1949

Pagination or Media Count : 16

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.

Descriptors :   *OCEAN SURFACE, *RADAR REFLECTIONS, ENERGY, DOPPLER RADAR, TRANSMITTANCE, LOW VELOCITY, LOSSES, VELOCIMETERS, REFLECTIVITY, ANGLE OF INCIDENCE, SEA STATES, FREQUENCY RESPONSE.

Subject Categories : Active & Passive Radar Detection & Equipment
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE