Study of Simulating Anomalous Ground Echoes for Doppler Weather Radar
Wang Hong-guang① Zhang Han② Wu Zhen-sen③
①(National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, Qingdao 266107, China) ②(Central Meteorological Observatory of 92493 Unit, People,s Liberation Army of China, Huludao 125000, China) ③(School of Science, Xidian University, Xi'an 710071, China)
Abstract：Ground and sea echoes with anomalous propagation are serious issues affecting Doppler radar data quality. Based on the weather radar equation and the propagation model for tropospheric duct, a method of calculating the ground and sea echoes of weather radar is presented. With refractivity profiles and digital elevation data as input, the method can calculate the distribution of the path loss. Then the reflectivity fields can be obtained considering the parameters of the radar and the scatting coefficient of the earth surface. The ground and sea echoes are simulated in standard and atmospheric duct environments for Doppler weather radar located at the coast of Bohai, which indicate the effectiveness of the method in simulating the anomalous echoes.
2013, Vol. 35 
