Accession Number:

AD0679568

Title:

NRL TERRAIN CLUTTER STUDY: PHASE 2

Descriptive Note:

Final rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1968-10-21

Pagination or Media Count:

47.0

Abstract:

The second and final phase of a terrain clutter study was completed at Naval Research Laboratory utilizing the Four-Frequency Radar System installed in a WV-2 Super Constellation aircraft, BuNo 128324. This system is capable of transmitting and receiving four frequencies P,X,L, and C consecutively with a choice of horizontal, vertical, and alternating polarizations. The returns are gated at a fixed range and analyzed in a digital computer. Absolute clutter measurements have been taken over several sites at angles of incidence from 5 degrees to 60 degrees. The parameter measured was the normalized radar cross section in terms of the median value of its probability distribution. Data were obtained for this parameter as a function of incident angle, transmitted and received polarization, and radar wavelength for a wide variety of terrain types such as desert, mountainous, urban, and water. A significant conclusion was that the wavelength dependence of the terrain clutter varies from n 0 for urban terrain to n 32 for marshes.

Subject Categories:

  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE