Boosting the Accuracy and Precision of Your Precipitation Forecasts
Dual-Pol is set to greatly enhance the nation’s broadcasters’ ability to improve television weather programming by offering highly accurate, crisp depictions of precipitation types, such as hail, snow and rain as well as tornadic “debris balls”. Dual-Pol radars are becoming operational throughout the United States during the course of 2011.
- The WDT POLARIS (Polarimetric Radar Identification System) solution revolutionizes the way data is identified over radar systems.
- Offering 8X the resolution of tradition NEXRAD Information Dissemination Service (NIDS) systems, PolaRIS provides 2X greater accuracy for determining precipitation amounts.
Current U.S. weather radars transmit and receive horizontally polarized signals. This maximizes the radar’s sensitivity to liquid hydrometeors
Dual polarimetric weather radars transmit and receive both horizontally and vertically polarized signals. With the proper signal processing hardware and
associated software, this provides significantly improved accuracy of radar-based hydrometeor measurements, and the ability to classify precipitation more effectively as rain, snow, hail.
The basic principle of Dual-Pol operations is that the dual polarimetric data provides information about the shape and homogeneity of hydrometeors within a data volume. Combining this information with statistical analysis of radar data allows for classification of a range of hydrometeor species. Knowing hydrometeors types makes it possible to greatly enhance the quality control measures of radar data, and improve radar-derived products such as precipitation estimation.