Measured Spectral Extent of L- and X-Band Radar Reflections from Wind- Blown Trees
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 m/s, or at most 2.0 m/s 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 06, 1987
- Accession Number
- ADA179942
Entities
People
- J. B. Billingsley
- John F. Larrabee
Organizations
- Massachusetts Institute of Technology