Path Attenuation Estimates for the DPR

[摘要] The algorithm for the Surface Reference Technique (SRT) has been updated from version V6A to version V6X. The modified algorithm is designed to process dual-frequency radar data which are now available over the full swath. Comparisons between V6A and V6X show that the dual-wavelength version of the SRT (DSRT) eliminates some of the overestimates of path attenuation in the outer swath that occurred in the earlier version of the algorithm when dual-frequency data was unavailable in the outer swath. However, the DSRT is not reliable in cases of light rain rates where only the Ku-band channel detects rain, nor is it reliable in high rain rate cases where the Ka-band surface signal is lost through attenuation. A modified hybrid algorithm is planned for version 7 that can combine the best features of single- and dual-frequency path attenuation methods.

[发布日期] 2019-11-04

[学科分类] 大气科学

[关键词] ALGORITHMS;DATA PROCESSING;FREQUENCIES;MULTISPECTRAL RADAR;ATTENUATION;RADAR ATTENUATION;RAIN;PRECIPITATION MEASUREMENT;PRECIPITATION (METEOROLOGY)