NEW DUAL WAVELENGTH HAIL SIGNAL DERIVED FROM DIFFERENTIAL REFLECTIVITY (Z//D//R) DUAL POLARIZATION RADAR MEASUREMENTS: COMPARISONS WITH THE Z//D//R HAIL SIGNAL IN MAYPOLE '83.

Procedures for estimating rainfall attenuation along radiowave paths from radar reflectivity measurements alone have been shown to be of limited value without additional information such as ground-based disdrometer measurement or dual polarization radar measurements, e. g. , differential reflectivity. The latter radar parameter is used to derive a new dual wavelength signal h, which accounts for attenuation in rainfall and should be useful for detecting the presence of non-rain hydrometeors as well as hail.