K波段微波高光谱辐射计的晴空定标方法

K波段微波高光谱辐射计应用于大气探测方向，能够减少地表至对流层内的大气廓线误差和提高廓线的垂直分辨率.针对平均辐射温度在宽大气频谱和不同天空仰角下存在浮动的问题，结合所统计的北京地区往年廓线数据和晴空条件下的Liebe大气吸收模型（1993），提出了一种微波高光谱下改进的晴空定标方法.相比于传统的晴空定标方法，该方法利用先验的气象数据对定标过程进行优化计算，有利于提高平均辐射温度的预测精度.误差分析结果表明当K波段微波高光谱辐射计采用改进的晴空定标方法时，能够有效减少平均辐射温度对其定标误差的影响. 

Tipping calibration method for K-band hyperspectral microwave radiometer

The K band ground based hyperspectral microwave radiometer can be applied in the atmospheric sounding field, and it can improve the profile error and the vertical resolution of the moisture profiling from Earth's surface to the atmospheric troposphere. For the purpose of reducing the fluctuations of the atmospheric mean radiant temperature in different frequencies and different elevation angles, an improved tipping calibration method was proposed under hyperspectral microwave condition based on atmospheric profiles of Beijing in previous years and Liebe millimeter propagation model (MPM)(1993). Compared with the traditional tipping calibration, the proposed tipping calibration method can improve the prediction accuracy of the atmospheric mean radiant temperature based on the priori meteorological data in the current area. Analysis results show that the impact of the atmospheric mean radiant temperature on calibration errors can be effectively reduced with the improved tipping calibration method for the K-band ground-based hyperspectral microwave radiometer.