In order to play a part in evaluation and manage of water resource for weather radar, the quantitative rainfall measurement of dual polarization doppler weather radar is developed. And based on the observed values of ombrometer, the differences of the measured values derived from different methods are analysed. The results show: The rainfall using KDP to calculate, i.e. R(KDP) method, is proximal to the data of ombrometer; R(ZH) and R(ZH, ZDR) method is underestimate rainfall obviously; R(ZDR, KDP) method is overestimate rainfall. With further analysis, rainfall measured by dual-polarization radar, especially from R(KDP) method, has higher precision, and provide the spatial distribution of the rainfall and the position of strong center well.

Triangle situation is a prerequisite for the effective implementation of the towed decoy interference when combat aircraft faced with missile, which described the relative positional relationship between combat aircraft, towed decoy, and missile. However, it has been a lack of mathematical modeling, signal-level closed-loop simulation and typical scenarios that combine the use of tactics and interference effects assessment. From the perspective of how to maximize the defensive side of the performance of air defense weapon system is also an urgent need to solve the problem. On the basis of the establishment of PD seeker coherent video simulation model, by studying towed decoy signals, tactical choice, constructed loop simulation analysis to complete the process of analysis of the confrontation between the triangular situation, the relevant factors effect are quantitative assessment and gives several useful suggestions.

Abstract.A reusable framework of pulsed Doppler radar seeker (PDRS) is established for coherent video signal simulation, which provides an efficient tool to its design and evaluation. General PDRS configurations are described with emphasis on performance limitations. The discussions on the key parts of PDRS are self-contained and provide sufficient detail to allow a clear understanding of principles involved, which are depicted in a series of UML class diagram. Augmented proportional navigation law is used to generate the acceleration demands, while the bank-to-turn control command to obtain the fin-angle demand and the six degree of freedom (6-DOF) missile motion solution can then be accomplished by using missile aerodynamic characteristics. An air defense warfare scenario is designed to validate coherent video modeling. The 6-DOF trajectory simulation is also considered. The electronic countermeasures are also taken into account. Results show that this PDRS coherent video model is accurate for 6-DOF trajectory simulation, and the closed loop simulation offers an effective and practical way to design parameters and evaluate performance of missile.

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