Abstract: The relation between radar parameters such as radar gain, beam width and impulse width and radar reflectivity based on the parameters of airborne phase array weather radar at X-band were proposed. Combined with weather radar equation correction and flight parameters, horizontal sector scanning and vertical sector scanning reflectivity data of airborne phased array weather radar were simulated based on new generation weather radar (CINRAD/SA) reflectivity. The results show that along the radial direction, the distance resolution of airborne phase array radar used impulse compress technology is higher than new generation weather radar and along the shear direction, because antenna gain and beam width changing with the elevation, the smooth effect of the phase array radar data is obvious and its sounding accuracy is lower than new generation weather radar. On the other hand, after adopting the echo attenuation correction method, the credibility of airborne phased array weather radar reflectivity is higher, which provides more accurate dangerous weather warning for the pilots.

Key words: airborne phase array radar, weighted interpolation, simulation algorithm, impulse compress, echo attenuation