Design And Realization Of The Command And Display Software System In Xichang Satellite Launch Center

The command and display system is command centrum, it's performance affects the consummation of satellite launch. The system centralizes and processes the data of launch, measure control, communication and weather branch system etc. The commander tunes and commands the process of launch task according to the information of the system.The main task of the system is to accept data from the central computer system, and convert to information of graph, curve and text etc for the user. It introduces parameter dictionary structure to explain real-time data and save to internal memory mapping files. For data needed for curves, it designs curves define files as well as the curves'origin, abscissa and ordinate. Also it introduces the technique of script explaining for display. In this way, it improves efficiency of software maintenance mostly.The command and display system includes data processing, synthetic display, GIS and auxiliary tools processes. The data processing process is to accept data from the central computer system and provide data support for synthetic display and GIS processes. It introduces parameter dictionary and curve dictionary structure to explain real-time data and save to internal memory mapping files. For data needed for curves, it designs curves define files as well as the curves'origin, abscissa and ordinate. The data processing process handles real-time data according to the curve define file and save to curves buffer area. The synthetic display and GIS processes read internal memory mapping files from data processing process and display them. The synthetic display process has multi-images and introduces script explaining technology. Each image adopts scripts like C for definition and main program explaining scripts to display images. The process uses OpenGL technology to draw and display images in three dimensions. The GIS process is based on ArcGIS and uses MapObject to realize point fall track display with visible images and better interactivity. The auxiliary tools processes are characterized by data simulation, remote starting-up, switching images, start-up process, ending process and updating software. It is designed for operators to manage the command and display network.The paper analyzes the insufficiency of the elder command and display system, such as structure designed ,the software maintenance, the lack of display information, the lack of display style, the lack of visualization, the lack of three dimensions display's capability, the lack of data analysis and auxiliary decision, and no network manage etc. The author has researched the relevant technology the system's realization, and implements the system structure, resolves the problem of Parameter dictionary, Curve dictionary, visualization of OpenGL and auxiliary decision.