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Advances in Meteorology
Volume 2017, Article ID 6124149, 17 pages
https://doi.org/10.1155/2017/6124149
Research Article

Attenuation Correction of Weather Radar Reflectivity with Arbitrary Oriented Microwave Link

1Army Engineering University of PLA, Nanjing 210007, China
2College of Meteorology and Oceanology, National University of Defense Technology, Nanjing 211101, China
3LAGEO, Institute of Atmospheric Physics, UCAS, Beijing 100029, China

Correspondence should be addressed to Peng Zhang; moc.oohay@oetem_gnepgnahz

Received 17 July 2017; Revised 20 November 2017; Accepted 7 December 2017; Published 31 December 2017

Academic Editor: Youcun Qi

Copyright © 2017 Peng Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To compensate radar reflectivity for attenuation effect, a new method for attenuation correction of the radar reflectivity using arbitrary oriented microwave link (referred henceforth to as ACML) is developed and evaluated. Referring to the measurement of arbitrary oriented microwave link, the ACML method optimizes the ratio of specific attenuation to specific differential phase which is a key parameter in attenuation correction schemes. The proposed method was evaluated using real data of a dual-polarization X-band radar and measurements of two microwave links during two rainstorm events. The results showed that the variation range of the optimized ratio was overall consistent with the results of the previous studies. After attenuation correction with the optimal ratios, the radar reflectivity was significantly compensated, especially at long distances. The corrected reflectivity was more intense than the reflectivity corrected by the “self-consistent” (SC) method and closer to the reflectivity of a nearby S-band radar. The effectiveness of the method was also verified by comparing the rain rates estimated by the X-band radar with those derived by rain gauges. It is demonstrated that arbitrary oriented microwave link can be adopted to optimize the attenuation correction of radar reflectivity.