The infrared Astronomical Satellite IRAS is equipped with an on-board computer system that takes care of vital satellite functions as attitude control, ground dialogue and execution of the observation programs. Therefore an important purpose of the IRAS system tests was the Verification and Validation of the on-board software. The test configuration was largely determined by the attitude control system. Provision of representative inputs for the attitude control system tests, required orbital simulation. The attitude control functions resident in ROM were exercised extensively in closed loop (satellite dynamics model in Ground Checkout computer), providing a flexible environment for combined black and white box testing. The less critical but more accurate RAM software has to be exercised in open loop (attitude sensor stimuli precomputed on a mainframe). The large amount of RAM software permitted only functional (black box) testing. The closed loop method was confirmed to be the most desirable.


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    Title :

    Verification and validiation of IRAS on-board software


    Additional title:

    Verifikation und Gueltigkeit der IRAS-Bordsoftware


    Contributors:


    Publication date :

    1983


    Size :

    6 Seiten, 3 Bilder


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    IRAS on-Board Software

    G. J. Hameetman | NTIS | 1977



    Experiments in modern control on-board IRAS

    ZWARTBOL, T. / HAMEETMAN, G. / SLIPPENS, C. et al. | AIAA | 1984


    The IRAS on-board data handling system

    Sprengers, H.C. | Tema Archive | 1978


    On-board data processing for the IRAS telescope system

    Lum, H. / Wong.D. / Long, E. | Tema Archive | 1978