![]() The atmospheric field consists of many small particles, each of which corresponds to a vector echo signal, and the radar echoes are presented by superposition of these vector signals. used the Advanced Regional Prediction System (ARPS) to simulate and generate an atmospheric field for avoiding the shortcomings of the Capsoni research methods, and designed and implemented a real-time radar simulator, which can generate three-dimensional time series. The contribution of each particle to the radar echo is accurately estimated, but the method is lack of real-time. simulated the multi-parameter polarization radar by setting raindrop particle distribution units with different sizes and shapes. Therefore, how to quickly obtain an effective test signal source has become an important research topic.Ĭapsoni and D’Amico proposed a multi-parameter radar simulator based on the physical characteristics of rainfall, but did not generate radar echo signals with polarization information. If we can simulate the echo sequence received by the real weather radar, not only can it optimize the design parameters of the radar system, but also help to improve the performance and advance the research and development efficiency of the weather radar. In this process, it is essential to provide an effective signal source for weather radar. In the process of production and research and development of the weather radar, the evaluation of the signal processing performance of radar receiver is an indispensable link. The signal receiving and processing part is one of the core parts of the Doppler weather radar system, and its technical indicators play an extremely significant role in the performance evaluation of the radar. The experimental results show that this method can describe the microphysical characteristics of precipitation particles more completely and can be used to test the signal processing module of dual-polarization Doppler weather radar. The echo signals of horizontal and vertical polarization channels of dual-polarization weather radar are obtained by vector superposition of backscattering echoes of each particle. ![]() ![]() It is assumed that the raindrop particles of different sizes have the random distribution in the radar resolution volume, and then the spatial distribution of precipitation particles in the resolution volume is modeled. The Marshal-Palmer distribution is applied to describe the raindrop spectrum distribution of precipitation particles. In this paper, the precipitation echo of weather radar is simulated based on the theoretical basis that the falling raindrops have a shape well approximated by an oblate spheroid in the atmosphere. Using the scattering characteristics of particles to simulate the radar echo can supply the test signals close to the real precipitation echo for the weather radar and save the time and cost of the research and development and maintenance of the weather radar. ![]()
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