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- W2894049188 abstract "The microwave radiation imager (MWRI) located onboard the FengYun-3C (FY-3C) satellite provides a considerable amount of critical information for numerical weather predictions. Obtaining accurate geolocation results from the FY-3C MWRI data is of great importance. In this letter, we improve the traditional coastline inflection method (CIM) and propose an <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$ell _{0}$ </tex-math></inline-formula> sparse approximation model for geolocation error estimation and correction. Specifically, we propose using the jump point of the step function to estimate the true coastline point. This approach can characterize the geolocation errors more accurately than the CIM, which further improves the geolocation accuracy. In the theoretical part, we provide a complete solution to obtain the step function through an iterative blind deconvolution. For a practical use, we demonstrate the effectiveness of the proposed method for geolocation error estimation through quantitative results obtained on the FY-3C MWRI data. The experimental results show that the proposed method can achieve an improvement of up to 33.33% in the standard deviation of geolocation errors (approximately 0.00030) compared to the traditional CIM (approximately 0.00045). Furthermore, we also apply the proposed method to the FY-3C satellite and improve the geolocation accuracy of the MWRI data through geolocation error correction." @default.
- W2894049188 created "2018-10-05" @default.
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- W2894049188 date "2019-01-01" @default.
- W2894049188 modified "2023-10-15" @default.
- W2894049188 title "<inline-formula> <tex-math notation=LaTeX>$ell_0$ </tex-math> </inline-formula> Sparse Approximation of Coastline Inflection Method on FY-3C MWRI Data" @default.
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- W2894049188 doi "https://doi.org/10.1109/lgrs.2018.2867738" @default.
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