CAJ | 학술논문

反常传播引起的地物回波是影响新一代天气雷达数据质量重要因素。根据天气雷达方程和对流层大气波导传播模型，该文建立了可模拟天气雷达地物回波的方法。该方法以大气折射率剖面和地理高程为输入数据，利用抛物方程模型计算路径损耗分布，结合雷达参数和地海面散射系数，得到地物回波等效反射率因子。仿真计算了标准大气和大气波导折射环境下，我国渤海沿岸多普勒天气雷达的地海面回波情况，结果表明了该方法在模拟天气雷达反常地物回波方面的有效性。
반상전파인기적지물회파시영향신일대천기뢰체수거질량중요인소。근거천기뢰체방정화대류층대기파도전파모형，해문건립료가모의천기뢰체지물회파적방법。해방법이대기절사솔부면화지리고정위수입수거，이용포물방정모형계산로경손모분포，결합뢰체삼수화지해면산사계수，득도지물회파등효반사솔인자。방진계산료표준대기화대기파도절사배경하，아국발해연안다보륵천기뢰체적지해면회파정황，결과표명료해방법재모의천기뢰체반상지물회파방면적유효성。
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.