Based on historic radiosonde data of changchun city , jilin province and xian city . shanxi province and on the typical model of profiles of cloud liquid water content for stratiformis , the coefficients of retrieval equation are obtained as the functions of height for each month from april to july in the two cities . furthermore , we explore the internal physics signification of retrieval coefficients ' distributing according to every month and have comparisons between the two cities . then the numerical simulation tests of the accuracy of retrieval results are given : the statistical relative deviation of retrieved values of l to the simulated " trues " on the ground is 15 - 25 % and that at altitude of 6km is 5 - 10 % , that means the retrieval method and implementation of the method are applicable to processing measurements of an airborne radiometer made in china recently 本文介绍机载对空微波辐射计探测云中路径积分液态水含量( l )的辐射传输原理和反演方法；根据吉林省长春市和陕西省西安市的历史探空资料和典型的层状云液水垂直分布模式，得到这两个地区4 - 7月各月的随高度而变的反演公式及其系数的表达式；探索了和反演系数有关系的大气的影响，并在各个月份之间进行了比较分析；给出了反演误差的数值模拟检验结果：在地面反演值对‘真值’的统计相对偏差是15 - 25 ，在6公里高度处为5 - 10 ，表明该方法已具有实用可接受的精度。
Measurement of pressure , temperature and humidity operated in much the same principle as the older version of radiosonde , but computation of wind was made use of the vlf ( very low frequency in the range of 10 - 13 khz ) signals of a world - wide navigational network , omega 该系统量度高空气压、气温及湿度的方法与旧式无线电探空仪大致相同，但在测风方面则采用了一种新的概念，利用世界性奥米茄导航站网的甚低频信号（ 10 - 13khz ）来计算出高空风向和风速，无需用雷达追踪探空仪位置。
Besides , the information on actual height of lowest cloud base is used in constructing of cloud liquid water profile by using radiosonde profiles , that makes an improvement of relative accuracy of retrieved value of l at almost all altitudes by 5 - 20 % according to numerical simulation comparison . the lower the altitude is , the more the accuracy is improved 为减少由于回归样本中云液水廓线的‘失真’给反演造成的误差，本文在对探空廓线作诊断建立云液水廓线时，引入了实际目测的最低云底高的信息。数值模拟比较表明该措施行之有效，使对流层中下层的几乎所有高度上l反演值的精度提高5 - 20 ，观测高度越低，精度提高越多。
