The main issue of this paper is how to make use of the observation of doppler radar to mesoscale numerical forecasting , using doppler radar data to improve on the initial field of numerical model , and then examine the results 本文要探索的主要问题是如何把多普勒天气雷达观测资料用于中尺度数值预报，用多普勒雷达观测资料改进数值模式的初始场，看其效果。
Combined with the real - time data obtained from radar and satellite , a variety of severe convective weather events were studied in detail , especially the relation between cg lightning and radar and satellite data 并结合多普勒雷达、卫星等实测天气资料对大量的强对流天气个例进行了细致的分析，探讨了强对流天气过程闪电的演变特征以及闪电与雷达、卫星等资料的对应关系。
A interception probability reduction theory by means of comparing the rppm with constant pri pulse sequence is also analysised in this paper , further more the strong properties of eccm of the rppm is discussed and analysised 此外，本文还介绍了随机脉位调制信号比较于等重复周期( pri )脉冲信号来降低信号被截获概率的原理，讨论并分析了随机脉位调制脉冲多普勒雷达较强的抗干扰能力。
In the thesis , the environment signals such as targets reflections , jamming and clutters before the receiver of the pulse doppler radar are presented ; the analysis , modeling and simulation of these signals are discussed 本文对脉冲多普勒雷达的目标回波、干扰信号、地杂波等雷达接收机前端的环境信号的仿真进行了阐述，对各环境信号进行了分析，建立了信号模型，并给出了仿真结果。
Measured result shows that the doppler radar signal we get in the self - oscillating mixer based doppler radar is about 400hz which matches well with the velocity of a moving object . the best conversion loss in fmcw system measures - 10db which is similar to the simulated result 通过对自振混频技术在多普勒雷达中应用的测试,得到多普勒回波信号的频率为400hz ,运动速度可以计算为6m / s ,与实际物体的运动速度相吻合。
Finally , the calculating programs of the processing method of the tested data by doppler radar of the rocket - assisted cartridge have been programmed and the model of the data processing method and the reliability of calculation have been tested and proved by calculation of actual examples 通过编制火箭增程弹多普勒雷达测试数据处理程序，进行实例计算证明，本文推导的数据处理方法正确可靠。该方法可以用于火箭增程弹多普勒雷达测速数据处理。
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。
In chapter 3 , this paper recommended the methods of estimating the parameter of moving target using cyclostationary and analyzed the performance of this method firstly , and put forward a recursive method for estimating the parameter ( velocity , acceleration ) of moving target combining the characteristic of high - prf pulsed doppler radar . then , based on the resolution of doppler and acceleration , combining the characteristic of the doppler spectrun and acceleration spectrum , this paper put forward a new method for differentiating muli - target 然后，从弹载高重频脉冲多普勒雷达的多普勒分辨率和加速度分辨率出发，结合不同编队方式的多目标回波信号的特点，分析了多目标和单个目标的回波信号的多普勒谱和加速度谱的特性，提出了一种基于一维多普勒像和一维加速度像的级次多目标分辨算法。
The fourth section studies the modeling of broad band blocking jamming and coherent jamming , and analyses the principal of coherent jamming and the factors of influencing the jamming effect is provided . the performance of pulse doppler radar seeker is simulated when certain jamming methods is exerted . a pulse doppler radar seeker simulation system is established , by using the simulation system the performance of pulse doppler radar seeker is evaluated when jammed 第四部分研究了宽带阻塞式干扰和相干干扰的建模问题，并分析了相干干扰作用原理，给出了影响干扰效果的主要因素及次要因素，仿真了脉冲多普勒雷达导引头在宽带噪声干扰情况下的截获和跟踪性能，仿真了相干干扰对脉冲多普勒雷达导引头跟踪性能的干扰效果。
