Remote sensing of the directional ocean wave spectra using HF backscatter radar
Abstract
Superresolution spectrum estimation techniques used in the remote sensing of the wave-height (DOWS) using HF backscatter radar were studied. The techniques investigated directional ocean wave spectrum are: (1) multiple signal classification (MUSIC), (2) maximum entropy (ME), and (3) maximum likelihood (ML). Two unbiased estimates of the directional spectrum based on the MUSIC and the ML algorithms were developed and implemented. The estimates of the DOWS using such techniques were compared with estimates using synthetic aperture radar. The comparison showed good agreement in estimating the mean direction of energy and the half power width. The advantages of using superresolution techniques are: (1) no assumptions need to be made about the shape of the spectrum and (2), if the ship (radar) is moving in a straight line, the spectrum estimate is not affected as long as the ship speed is less than the phase velocity of the ocean waves.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1982
- Bibcode:
- 1982PhDT.........9E
- Keywords:
-
- Ocean Surface;
- Radar Measurement;
- Remote Sensing;
- Spectral Resolution;
- Water Waves;
- Backscattering;
- High Frequencies;
- Radar Resolution;
- Radar Scattering;
- Synthetic Aperture Radar;
- Communications and Radar