In this paper , experimental equipments and process are given in detail . the results of experiments show that nucleation rates of new seeding agents have been improved 研究方法是利用中国科学研究院大气物理研究所的三维层状云模式进行模拟，得出自然云和被催化云的特征。
These results suggest that the new scheme will provide some valuable information on macro and micro structure characteristic of stratus cloud , physical process of precipitation and weather modification research 说明新方案可以为层状云的宏微观结构特征、降水物理过程和人工影响研究提供一定依据。
In the paper using the cloud particle characteristics and particle spectrum data in different heights , the vertical macro and microstructure or the coagulation water phase can be partitioned into 5 growth layers 本文通过对不同高度上的粒子特征量和谱分析，降水性层状云宏微观垂直结构配置或水凝物主要特性可以分为5个发展层。
Stratiform clouds are layered clouds formed mainly by uplifting of air on a large scale , commonly seen near a front , which signifies the interface of warm , moist air climbing up cold air on encountering the latter 乌云接日头，半夜雨稠稠的层状云天气：层状云主要由大范围的气流上升运动形成，常见于锋面附近，即暖湿空气碰到冷气团，向上爬升的交界面上。
It was well known that the main process of precipitation formation was collecting cloud water in the warm area and ice phase particles melting in the cold area . positive vertical velocity existed between 700hpa and 500hpa in the warm area and near surface in the cold area . wind convergence existed at the height of 700hpa , and divergence existed above and below the height of 700hpa 通过对降水云系的综合研究，建立了河南省春季层状云降水概念模型：暖区降水主要通过云水碰并形成，冷区降水机制以冰粒子融化等冷云过程为主;暖区700一50ohpa通常有上升气流，冷区上升气流分布在近地面附近: 700冲a存在风场的辐合，其上下则主要是辐散区;水汽主要集中在7o0hpa高度上，暖区水汽来自南、东南方向，冷区水汽以西南输送为主;暖区位势不稳定分布在o 。
Analyzed results of macro observed data showed that the configurations of stratus cloud systems were inhomogeneous , and stratus cloud systems consisted of several single clouds . different clouds were departed by obvious borderline , and the height of cloud top changed between 4 and 8km . the height of 0 level occurred at about 3 . 5km height which was meant that super - cold cloud existed 由观测资料分析可知，河南省春季层状云系结构不均匀，云系由若干个云块组成，云块之间有明显的界线，云顶高度在4 8km之间起伏变化，零度层亮带高度约为3 . 5km ，云系存在一定厚度的过冷云层。
In this paper aircraft has made vertical and synthetic detecting flying purposefully on 9 . 17 , 2003 according to cloud ' s macro and microstructure . vertical layers and representative places of stratiform cloud on 9 . 17 , 2003 are analyzed using the observational data of particle measurement system ( pms ) , combined with satellite data , radar data , and precipitation data on ground . by this we have got cloud ' s microphysical structure and physical process of the natural precipitation , and the physical effect evidence has been testified according to observational data after lco2 seeding 本文用综合观测的方法，利用机载pms云粒子探测系统，根据云系的宏微观结构特征进行有针对性的垂直探测飞行，配合卫星、雷达、地面雨量、雨强计网观测资料对2003年9月17日延安降水性层状云系中那些有代表性的部位或垂直分层做细致的观测分析，获得云系的微物理结构和自然降水形成的物理过程，并用观测事实来验证人工增雨引晶催化后的物理响应判据。
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。
Three - dimensional high - density space / time soundings serve as the main body of data consisting of 3 - hr interval doppler probings , 10 - 30 min rainfall intensity , surface raindrop sizes sampling and gps - guided flight cloud physics detections with output taken at 2 - sec and 200 - m intervals . and specific systems associated therewith are developed for multiple - way communication and data collection and storage , a platform for analysis , retrieval softwares for dominant items and multi - scale cloud models - all constitute a system of techniques for meso to microscale observations and analysis . 2 ) atmospheric water resource and macroscopic rainfall properties in dry periods of spring and autumn of the target region 以加密观测的多普勒雷达、 3小时探空、 10 30分钟雨强、地面雨滴谱等间隔取样及在gps引导下的飞机云物理探测等获取的三维高时空密度的综合探测为主体；配合专项设计开发的多路通讯采集存贮系统、多类信息的分析处理平台、主要观测项目的分析反演软件，结合多尺度云系模式，综合构成层状云系中微尺度探测和分析处理技术方法。
The output of the new scheme could give reasonable microstructure of cloud and indicate some characteristics of stratus cloud , which enhances the capability of mm5 to study the cloud microphysical process . the numerical simulation reveals the possible mechanism of the rainfall by one station microphysical process analysis 模拟给出了云的合理微观结构，揭示了层状云的一些特征，增强了mm5研究微观云物理的能力；通过单站微物理过程分析，揭示了降水过程的可能形成机制。
