Accession Number:

ADA179942

Title:

Measured Spectral Extent of L- and X-Band Radar Reflections from Wind- Blown Trees

Descriptive Note:

Progress rept.

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Report Date:

1987-02-06

Pagination or Media Count:

110.0

Abstract:

Measurements of the spectral content of L- and X- band radar reflections from several resolution cells containing wind-blown trees are examined under a wide variety of typical wind conditions. Most of the discernible energy i.e., within 60 dB of the peak zero-Doppler level occurs in the spectra at Doppler velocities usually less than 1.0 ms, or at most 2.0 ms on very windy days. The rates of decay of energy with increasing Doppler velocity in the tails of the spectral distributions at spectral off-sets well removed from zero often appear to be approximately exponential. Estimates of rates of exponential decay in the spectral tails as a function of windspeed are provided in three regimes of windspeed.

Subject Categories:

  • Active and Passive Radar Detection and Equipment
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE