| The visibility analysis is widely used in military, correspondence, realty, airwaves, network, and so on. At present, it is also widely used in aviation, along with the development of the aviation.The paper particularly discusses the evolvement of the visibility analysis in the theory research and the application status in multi-domains, brings forward the necessity of the research in the especial domain of airdrome. Further more, the represent form of the visibility analysis of radar viz. detection range of radar is emphatically explained. At the same time , the paper puts forward the existent problem in the display of the detection range of radar, which manifested by second-dimension graph. Due to the single representation of second dimension graph, the distributing situation of the electromagnetism information couldn't be represented three-dimensionally. So, the paper brings forward three-dimensional modeling based on the GIS, also realizes the display of the detection range of radar on DEM. In addition, the paper realizes the model of visibility analysis and accuracy analysis based on GIS and the system of visibility analysis and accuracy analysis. The aim of the system is the realization of the dynamic analysis of orientation, in order to realize the airport overlay by radar, in the condition of lowest cost and high accuracy.The main contents of this study are as follows: the theory of the visibility analysis; the model of visibility analysis and accuracy analysis; the system of visibility analysis of radar and accuracy analysis of passive location in the air station based on the GIS; system structure and system function, the developing method and the needing software.The results are as follows: It puts forward the improved method aiming at the display of the detection range of radar; Secondly, the paper realizes the auto adjustment of the radar's position. Thirdly, it puts forward the model of accuracy analysis. |
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