Design And Implementateion Of The Spacecraft Data Collection And Dispatch Subsystem In "Xi'an Center System

Based on the DODS (spacecraft Data collection and Dispatch Subsystem) in "Xi'an Center System", this paper describes particularly the key problems in developing the DODS and sets forth corresponding solutions, which establishes solid foundation for successfully developing the DODS.In the part of introduction, it firstly analyses the main problems faced in XSCC software system. Then it summarizes the signification of "Xi'an Center System". At the same time, it explains the DODS's status and the function in "Xi'an Center System". At last, the content and structure of this paper is introduced briefly.In the second chapter, in order to solve the difference in data exchanging format which are used by many subsystems in XSCC, this paper sets forth a kind of universal data exchanging format, named UDF (Universal Data Format), which will be used in every subsystem in "Xi'an Center System". Also this chapter gives the explanations about the UDF and its important meaning in application.In the third chapter, it mainly illustrates the oriented online cluster backup algorithm. Firstly it analyses the system reliability for the DODS. Then it describes in detail the designation and accomplishment oriented online cluster "backup algorithm. Finally the application result is presented.In the forth chapter, this paper presents the functions of software engineering used in developing and implementing DODS. At the beginning, it analyses many problems caused before by the development of XSCC software system without using software engineering. And then it explains the ways of software engineering used in DODS in detail. Finally it proposes a solution of controlling the version of code in U1NX.On the ground of the former chapters, in; the fifth chapter, what this paper done summarized up , then my experiences and gains from my work in developing DODS are given.