ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 49 Issue 4 > 2023,49(4):487-494. DOI:10.7519/j.issn.1000-0526.2022.112001 Prev Next
Analysis of Attenuation Correction to an X-Band Dual-Polarization Doppler Weather Radar at Pudong, Shanghai
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Abstract:
Rainfall attenuation to X-band weather radar measurement is significant, and can lead to the weakening of radar reflectivity factor and inaccuracy in quantitative applications. By using the Z-K〖KG-*4〗DP correction method, the data collected by the X-band dual-polarization Doppler weather radar at Pudong, Shanghai were tested. The specific scheme is as follows. When KDP≥0.3°·km-1, the value of KDP is used to correct the attenuation; when KDP < 0.3°·km-1, the empirical formula between A and Z is used to correct the attenuation. The convective precipitation case (17 September 2020) and the stable precipitation case (26 February 2021) were selected for the test. After attenuation correction and system bias correction, the results show that both the value and the spatial distribution of the X-band’s radar reflectivity factor are close to that of the S-band weather radar. Such Z-KDP method is effective to correct the attenuation from both convective rainfall and stable rainfall.
Keywords:
X-band dual-polarization radar, attenuation correction, reflectivity factor
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