Monopulse Radar Tracking System To Track Process Automatic Calibration Method

Due to the good tracking performance, channel resources saving and high reliability, SCM tracking system is commonly used in the tracking system of remote sensing, measuring and controlling satellite ground station in our country. SCM tracking system is also a popular tracking system in foreign countries, especially it has the wide range of application in telemetry system. Phase difference of the tracking system can be influenced by a variety of factors, which sequentially influence the accuracy and stability of the whole tracking system. Therefore, systematic and differential-channel phase difference of SCM tracking system is one of the key factors influencing the tracking performances. To this end, the phase difference calibration is a very important work for the ground system routine maintenance.Ground stations still take the directional sensitivity calibration in SCM tracking system, which is a traditional phase calibration method, and it has the defects of complex operation, inefficiency, high cost and narrow application scope. As China is enriching the type and amount of the satellites in orbit, the related task of the ground station increased. Hence the traditional method cannot meet the growing running requirement of the fixed ground station, let alone the demands of ground receiving system of remote sensing satellite in which the fixed ground stations, motor vehicle carrier stations and ship-based stations coexist.Focusing on the study of towerless phase calibration during the tracking, this thesis presents a research of a new type phase calibration method for SCM tracking system. Firstly, the implementation principle of SCM tracking was expounded. Based on the relevant theory of SCM system, the difference channel phase effects was analyzed briefly, and the correction photograph theory of traditional directional sensitivity with its implementation method was discussed and proposed. Secondly, on the basis of curve characteristics analysis, this thesis analyzed the SCM tracking system error voltage and explained the corresponding relationship between phase difference and error voltage in tracking process based on simulation module. Then the correction photograph method about SCM tracking system in tracking process was proposed, its technical principle, implementation arithmetic, emulation mode and related conclusion were chiefly discussed. Thirdly, after systematically realizing the proposed method and introducing module function of correction photograph system, a new correction photograph system in ground station of remote sensing satellite was discussed. Finally, we verified the proposed model of this article through satellite tracking, and summarized the whole test.