Spaceborne Sar Calibration Field Operation And Management Software System Design And Implementation

With the development of the spaceborne SAR technology, calibration technology becomes more and more important, the need for whose application is continuously increasing. Calibration field, the ground for actualizing calibration activities, plays a primarily important role in the process of calibration, since it is essential for successful data collection and analysis, calibration image process and so on, which has been the focus of the calibration activities.A Calibration Management System is developed in this dissertation. The Calibration Management System is based on ground calibration and combined with the external systems. It has realized constituting, optimizing and implementing the calibration scheme. Besides, it has the function of managing and transferring samples and it also has interface with the external system.In the process of constituting and optimizing the calibration schedule, the accurate calculation of the satellite's poses, covers and passing time through the calibration devices is needed. The key algorithms are induced and analyzed in this dissertation. In particular, it is analyzed that the insufficient accumulation for the SAR received signals and inadequate extraction of the energy would do harm to the mapping of the bandwidth. Besides, the accuracy of the satellite's cover is discussed in detail, with the respect of numerous factors.During the calibration, the influence of the multipath noise is terrible. In order to make a quantitative analysis for the multipath noise, an Analysis Model and some applicable algorithms are induced, which supplies introduction for the multiplay analysis in the calibration activities.The software is combined with the database, realizing abundant data and relative information's storage and retrieval. Meanwhile, in order to realize the result's viewable and convenience for the users, the system makes use of a GIS map control called MapX to complete some relative functions.The emergence of the Calibration Management System not only realizes the management of the spaceborne SAR calibration, but also enhances the efficiency and saves material and human resources.It is the first time for the development of this kind of software which has self-contained functions and correct principles in the home, and it is implemented simply and can be applied to the practical projects.