Modelling and quantitative analysis of tropospheric turbulence impacts on GEO SAR imaging

Geosynchronous orbit synthetic aperture radar (GEO SAR) has a long synthetic aperture time and a large-scale imaging scene. Therefore, various non-ideal factors tend to accumulate, introducing phase errors and decreasing the imaging quality. During the long integration time, troposphere is time varying and space variant, which will result in image shifts and defocusing. According to the characteristics of GEO SAR, this study completes the modelling and the quantitative analysis of tropospheric turbulence. Based on the phase-screen theory, the amplitude and phase random fluctuations caused by the turbulence which will result in the defocus of images are analysed. However, in the natural environment, the imaging of GEO SAR system is affected weakly by the turbulence and this conclusion is proved from the spectral analysis.

Abstract licence: CC BY-ND

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