An algorithm to improve the NEXRAD rain rate estimates

A Doppler WSR-88D radar (NEXRAD) is currently operating in Cayey (East of PR, at 886 m). Reflectivity and rain rate (Z-R) relationships were developed using a dense network of rain gauges to validate radar estimates. These equations intent to correct the radar estimates for seasonal effects. Equations were derived for wet and dry seasons over Puerto Rico. To minimize the errors due to beam block and clutter, equations were derived with 20 rain gauges located 15 km or less from the radar location.