STUDY ON APPLICABILITY OF FY-4A SATELLITE SURFACE SOLAR RADIATION PRODUCTS IN XINJIANG

Wang Yupeng; He Qianshan; Liu Xin; Liu Qiong; Chen Yonghang; Sun Linlin

doi:10.19912/j.0254-0096.tynxb.2024-0078

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (5) : 428-439. DOI: 10.19912/j.0254-0096.tynxb.2024-0078

STUDY ON APPLICABILITY OF FY-4A SATELLITE SURFACE SOLAR RADIATION PRODUCTS IN XINJIANG

Wang Yupeng¹, He Qianshan², Liu Xin¹, Liu Qiong¹, Chen Yonghang¹, Sun Linlin¹

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Abstract

Based on radiation observation data from Xiaotang, Hetian, and Altai stations with different underlying surface types in Xinjiang, this study evaluates the applicability of FY-4A surface solar radiation products in the region. Combining FY-4A’s CFR and DSD products, the sources of errors are analyzed. Results indicate that, in terms of consistency, FY-4A correlates above 0.8 with ground observation radiation data at all three stations, with Xiaotang station exhibiting the best consistency, followed by Altai, and Hetian showing the least. In terms of errors, FY-4A generally exhibits higher values overall with a characteristic of ‘high values underestimate, low values overestimate’. Its applicability is best at Xiaotang station, followed by Altai, and poorest at Hetian, with mean absolute errors of 93.62 and 135.38 W/m²,respectively. FY-4A’s mean absolute errors at all three stations reaches maximum values in summer （greater than 114.08 W/m²） and minimum values in winter （less than 102.21 W/m²）. Compared to 11:00—14:00, errors are larger at 07:00—10:00 and 15:00—18:00 at all three stations. Analyzing error sources, when cloud cover exceeds 80%, the minimum proportion with a relative error greater than 90% is 17.05%. Under clear sky conditions, Hetian station has no dust pixels, while Xiaotang and Altai stations’mean absolute errors for dust pixels increase by 38.20 and 15.02 W/m² respectively. Under cloudy conditions, Hetian and Altay stations’mean absolute errors for dust pixels increase by 43.43 and 22.37 W/m² respectively, while Xiaotang station decreases by 80.67 W/m² due to more than half of its dust pixels being in the optimal range for FY-4A radiation retrieval.

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incident solar radiation / satellite data / surface observation / FY-4A / cloud covers

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Wang Yupeng, He Qianshan, Liu Xin, Liu Qiong, Chen Yonghang, Sun Linlin. STUDY ON APPLICABILITY OF FY-4A SATELLITE SURFACE SOLAR RADIATION PRODUCTS IN XINJIANG[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 428-439 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0078

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