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| Simulation of Radar Spectrometer Based on Signal Flow and Correction of Ocean Anisotropy |
| Bao Qing-liu①② Dong Xiao-long① Lin Wen-ming③ Zhu Di① Xu Xing-ou① |
①(Key Laboratory of Microwave Remote Sensing, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China)
②(University of Chinese Academy of Sciences, Beijing 100049, China)
③(Institute of Marine Sciences (ICM-CSIC), Barcelona 08003, Spain) |
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Abstract In order to research the signal preprocessing and the inversion method of the ocean wave, the simulation model of a space-borne real aperture radar spectrometer based on signal flow is established. The block diagrams for the modulation spectrum and directional spectrum simulation are provided. Using the simulation model, different ocean wave spectrum model and ocean conditons are simulated. The results show that the retrieved modulation spectrum and referenced modulation spectrum are highly related. What is more, a method used to correct the influence of the ocean anisotropy is proposed. The ocean anisotropy can be corrected by using the normalized modulation coefficient. The simulation results show that the directional spectrum retrieval error is significantly reduced after modulation coefficient correction, especially in the conditon that wind wave and swell wave exist simultaneously and are vertical to each other. The energy integral error of directional spectrum reduces to 2% from 20%.
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Received: 31 October 2013
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Corresponding Authors:
Bao Qing-liu
E-mail: baoqingliu2000@163.com
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2014, Vol. 36 
