X-band simultaneous horizontal and vertical transmit data and cross-coupling signatures

Simultaneous transmission of horizontal and vertical polarization waves

is becoming an increasingly popular way to attain dual polarization

radar data. Several papers have appeared in the literature analyzing and

illustrating the effects of cross-coupling of the H and V electric field

components. S-band measurements have been the focus of these papers. In this

paper, experimental X-band data from the new dual-polarized

TEAM-R (Taiwan Experimental Atmospheric Mobile - Radar),

owned and operated by National Central University, Taiwan, are used to demonstrate

cross-coupling effects on differential reflectivity (Zdr) and differential phase

(Phi_dp). Cross-coupling can be caused by either non-zero mean canting angle of the

precipitation medium or antenna polarization errors. Both low elevation scan data as well

as vertical pointing data are used to investigate and demonstrate cross-coupling artifacts.