Abstract
Dependence of radar cross section of rain drops on their diameter was analyzed for different wavelengths using numerical simulation. It is shown that in the short microwave range (λ < 3.2cm) the dependence has nonmonotonic character due to resonant scattering of electromagnetic waves by rain drops. Using the combination of operating wavelengths λ1 = 3.2 cm, λ2 = 10 cm, and λ1 = 5.5 cm, λ2 = 10 cm does not allow to apply a double-frequency method of remote sensing for retrieval of rain microstructure parameters, because the dependence of the differential radar cross-section weakly depends on drop dimensions. The system of inequalities was obtained, which permits to solve the ambiguity problem in the case of intensity retrieval by double-frequency sensing using shorter wavelength λ1 = 8 mm. It is shown that the use of the long-wave range of microwaves leads to decrease of the radar reflectivity for small raindrops that requires a significant increasing of power budget of meteorological radar and toughens up the requirements for measurement accuracy.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
