Dual-frequency radar ratio of nonspherical atmospheric hydrometeors

Dual-frequency radar ratio of nonspherical atmospheric hydrometeors

[1] Dual-frequency cloud and precipitation radar systems are being actively developed and installed on different platforms. The use of two radar frequencies (with at least one frequency outside the Rayleigh type of scattering for hydrometeors of interest) allows independent estimates of hydrometeor effective size. With these estimates, radarbased retrievals of such important parameters as cloud...

Variable pulse repetition frequency for the GPM dual-frequency radar

In space missions, the delay of a receiving signal to a transmission signal generally spans a few thousands microseconds due to long range observation. An efficient sampling can be achieved by transmitting pulses successively, as schematically shown in Fig. 1. For the later consideration, a catching integer n is to be introduced. In Fig. 1, the catching integer n is set at 11, for which a pulse...

Identification of hydrometeors and other targets by dualpolarization radar

Whereas different hydrometeor types cannot be readily distinguished using radar reflectivity alone, this paper shows how the differential reflectivity available from dual-polarization radars can be used as an indicator of hydrometeor type (when supported by reflectivity factor also), and that the spatial variability of differential reflectivity is a useful addition. Various hydrometeor types, g...

Atmospheric radar imaging using multiple-receiver and multiple-frequency techniques

Atmospheric radar imaging techniques have shown promise in revealing the fine-scale structure of the atmosphere within the resolution volume of the radar. Enhanced resolution can be obtained in both angle and range by using spaced receivers and shifted frequencies, respectively. The distinct techniques have been termed coherent radar imaging (CRI) for angular resolution enhancement and range im...

Finnish Meteorological Institute Contributions No. 93 Impact of the Microstructure of Precipitation and Hydrometeors on Multi-frequency Radar Observations