Calibration of radar differential reflectivity using quasi-vertical profiles
نویسندگان
چکیده
Abstract. Accurate precipitation estimation with weather radars is essential for hydrological and meteorological applications. The differential reflectivity (ZDR) a crucial radar measurement that helps to improve quantitative estimates using polarimetric radars. However, system bias between the horizontal vertical channels generated by produces an offset in ZDR. Existing methods calibrate ZDR measurements rely on intrinsic values of natural targets (e.g. drizzle or dry snow) collected at high elevation angles higher than 40∘ even 90∘), which close 0 dB are expected. not all systems can scan such point antenna vertically collect passing overhead. Therefore, there need develop new lower-elevation scans. In this work, we present analyse novel method correcting monitoring quasi-vertical profiles computed from scans 9∘ elevations. applied data through 1 year events two operational C-band UK. proposed shows relative error 0.1 when evaluated against traditional approach based 90∘ Additionally, independently assessed disdrometers located near sites. results showed reasonable agreement disdrometer-derived radar-calibrated measurements.
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ژورنال
عنوان ژورنال: Atmospheric Measurement Techniques
سال: 2022
ISSN: ['1867-1381', '1867-8548']
DOI: https://doi.org/10.5194/amt-15-503-2022