给出了微波在大气中传输受气体分子吸收导致衰减的较精确计算模型,该模型扩展了传统计算模式忽略温度、湿度、压力变化及传播距离受限制的近似算法.结合我国某地区的实测气象数据模拟计算了该地区的大气吸收衰减,最后根据数值计算结果分析了微波随频率、发射角度以及月份(季度)变化的传播特性,并简要说明了此研究在微波遥感中的实际意义.

This paper gives an accurate calculation model of microwave being absorbed in atmosphere which expands the traditional approximate algorithm that ignores the change of temperature,humidity and pressure and is limited by transmission distance,simulates the absorption attenuation in atmosphere of a certain area in our country according to its weather data from actual measurements,and finally analyses the propagation characteristic of microwave changing with frequency,elevation angle and season,and briefly explains the practical significance of this research in microwave remote sensing.