The complex temporal-spatial variation of raindrop size distribution will affect the precision of precipitation quantitative estimates\n(QPE) produced from radar data, making it difficult to correct echo attenuation. Given the fact that microwave links can obtain\nthe total path attenuation accurately, we introduce the concept of regional attenuation correction using amultiple-microwave-links\nnetwork based on the tomographic reconstruction of attenuation coefficients. Derived from the radar-based equation, the effect\nof rainfall distribution on the propagation of radar and microwave link signals was analyzed. This article focuses on modeling of\nthe tomographic reconstruction of attenuation coefficients and regional attenuation correction algorithms. Finally, a numerical\nsimulation of regional attenuation correction was performed to verify the algorithms employed here. The results demonstrate that\nthe correction coefficient (0.9175) falls between the corrected and initial field of radar reflectivity factor (root mean square error,\n2.3476 dBz; average deviation, 0.0113 dBz). Compared with uncorrected data, the accuracy of the corrected radar reflectivity factor\nwas improved by 26.12%, and the corrected rainfall intensity distribution was improved by 51.85% validating the region attenuation\ncorrection algorithm. This method can correct the regional attenuation of weather radar echo effectively and efficiently; it can be\nwidely used for the radar attenuation correction and the promotion of quantitative precipitation estimation by weather radar.
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