Distributed Satellite Systems Moving Target Detection And Mixed Baseline Phase Separation Method

In the last few years, people pay more attention to the distributed satellite SAR system. This model system brings forward a new concept SAR system. The micro-satellites, which has equivalent function of a big satellite, work together to accomplish one or more tasks. The new model system can provide more baseline and Contribute to data fusion. It has much more advantage than conventional single spaceborne SAR system because its baseline selection is agile and alterable. Also, it can be scale produced, and decrease launch expense.The dissertation mainly accomplishes works as follow:1. Do researches on the formation and orbit design of the distributed satellite SAR, analyze the error in the formation and orbit precision. On the basis of the research ahead, we analyse the cluster's orbit computational formula of the typical Cartwheel Model and Pendulum Model,summarize a logical and effective cluster mode.2. Do compare and analyse between DPCA and ATI technologies based on the Cartwheel Mode in the condition of different SNR and SCR circumstances to offer reference in the hybrid of ATI and DPCA technology in moving target detection.3. The dissertation constructs multi-channel hybrid baseline mode, and deduces the unwrapped phase formula in the distributed satellite SAR system, depart the hybrid phase composed by AT and CT components.4. From computer simulation, validate the multi-channel's good capacity of detecting moving target in noise environment. By the gotten AT phase, we can make relatively precise velocity value, and the unwrapped CT phase respectively can be gotten too to recover the DEM, then we make it come true that estimating velocity and describing background information by multi-channel at the same time.