A radar ocean imaging model for small to moderate incidence angles
作者:
DENNIS HOLLIDAY,
GAETAN ST-CYR,
NANCYE. WOODS,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1986)
卷期:
Volume 7,
issue 12
页码: 1809-1834
ISSN:0143-1161
年代: 1986
DOI:10.1080/01431168608948971
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Based on a first-principles scattering theory applicable to small to moderate incidence angles, a new imaging model for ocean features is proposed. In contrast to the Alpers and Hennings Bragg-based model, the new model incorporates the full ocean wave spectrum, utilizes Hughes' suggested spectral decay rate formula and contains no adjustable parameters. For typical ocean currents, the new model predicts realistic values for L-band cross section modulations and comparable L-band and X-band cross section modulations. These latter results are shown to be due to backscatter from ocean waves that are significantly longer than the Bragg resonant wave. By comparison the Bragg-based imaging model is shown to predict that X-band modulations will be at least one order of magnitude weaker than L-band modulations.
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