4:30 PM - 4:45 PM
[MIS14-11] Development of precipitation attenuation correction technique in a dual-pol radar network
Keywords:meteorological radar, rain
On the other hand, a weather radar, especially with transmitting short-wavelength pulses, is affected by precipitation attenuation. Various attenuation correction techniques for horizontal reflectivity (ZH) and ZDR using ΦDP and KDP were proposed. However, measured differential phase ΨDP consists of ΦDP and backscattered phase shift δco.
Especially at C-, or X-band, contamination due to delta cannot be ignored. Some δco removing techniques were proposed. Scarchilli et al. (1993) suggested recursive algorithm to remove delta from ΨDP in an individual radar using δco - ZDR relationship. They assumed coefficients in the power-law relationship. However, the relationship actually depends on DSD. In this paper, probabilistic attenuation correction technique based on the Bayesian theory in multiple dual polatimetric radar network, is proposed. The proposed technique considering δco effects also derive coefficients of relationships.