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9 September 2009 Satellite-based real aperture radar image spectrum simulation with Wen's wave spectrum
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Abstract
Some missions have been carried out to measure wave directional spectrum based on airborne real aperture radar in a low incidence. For this study, the authors simulate the satellite-based real aperture radar image spectrum to validate the radar performance of measuring the directional wave spectrum based on the same principal as airborne one. In the processes of the simulation, the authors don't take into account the rotation of antenna and the disturbing of the noise in order that the simulation can exclude other factors to purely verify the measuring theory feasibility in essence. The authors use Wen's spectrum as the input spectrum of the simulation, which is a kind of wind-generated wave spectrum that can better describe the state of developing wave and the statuses of the Chinese sea fields. Following that, the simulated sea surface, backscattered radar signal, modulation spectrum and the one dimension wave spectrum (two dimension one can be obtained by synthesizing every directional one dimension spectrum) are obtained, which is compared with the input spectrum. To have a comprehensive realization to the performance of the radar, different cases including different developing degree, wind speed and angle between dominant waves propagation direction and radar look direction are considered. Presented results show that Satellite-based real aperture radar can mostly measure the wave spectrum, but the capacity is limited on the cases of low wind speed, developing waves and the big angles.
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Lin Ren, Le Yang, Zhihua Mao, Jianyu Chen, and Delu Pan "Satellite-based real aperture radar image spectrum simulation with Wen's wave spectrum", Proc. SPIE 7473, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2009, 74730X (9 September 2009); https://doi.org/10.1117/12.830382
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