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Extracting method and characteristic analysis of coastal GPS signal reflected from sea surface

WANG Bo1,2，DONG Xiang3，LIU Hai-feng1,2，Lü Fu-liang4，WANG Wen-yan1,2   

  1. 1. Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology, Qingdao 266001, China； 2. Institute of Oceanographic Instrumentation, Shandong Academy of Science, Qingdao 266001, China；
    3. China Research Institute of Radio Wave Propagation, Qingdao 266106, China；
    4. North China Sea Marine Forecasting Center of State Oceanic Administration, Qingdao 266033, China
  • Online:2013-09-17 Published:2010-01-03

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Abstract:

The characteristics of global positioning system (GPS) reflections from sea surface collected by a coastal static platform are of crucial importance for remote sensing and retrieval, which can provide necessary parameters for system design. A method which is used to get the characteristics of weak GPS reflections is examined and analyzed based on experiment data, and the results show that the method is feasible. The performances of coherent and non-coherent integration with different integration times are also investigated in detail, and the results show that both of the two integration algorithms can significantly extract the reflections, and the signal-to-noise ratio obtained from the two algorithms is basically similar, when the integration time is more than 100 ms. The statistical characteristics of GPS reflections are Gauss function, which is different from those results obtained from other references. Moreover, the difference between two successive measurements of reflections can differ significantly as expected, which is at least 6 dB with a probability up to 90%.

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