After launch of a spacecraft, the role of the ground station software becomes critically important. The command and data handling software issues telecommands to the spacecraft, and retrieves, displays and stores telemetry from the spacecraft. The key feature of the dynamic design of the software described in this paper lies in the independence of the software graphical user interface (GUI) from the number of subsystems, telemetry channels and telecommands required at the design time and number of remote users at runtime. This independence enables to software to produce various graphical user interfaces with a unique number of telemetry channels and telecommands for users with different needs, preferences or privileges. The dynamic software layout is definable in the form of a configuration database. The data file is read by software at the time of initialization and user interface is built as defined in the file. Out-of-limit values for every telemetry channel are highlighted as defined in the configuration database. The user interface is powerful enough display a single telemetry channel into multiple units by simply defining different parameters for the channel. The graphical user interface is designed using multiple pages, with a tables of telemetry and telecommands on each page. Every telemetry and telecommand database entry contains page number, row and column of position, caption, unit, channel number, data type, minimum and maximum values and calibration equation for the channel to convert raw digital values to standard units.


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    Title :

    Dynamic Command and Data Handling Ground Station Software


    Contributors:


    Publication date :

    2007-06-01


    Size :

    2230135 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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