AbstractWe present a numerical algorithm, based on a ray-tracing technique, to simulate the signals produced by asteroids crossing the fields of view of the GAIA astrometric detectors. The basic concepts of the simulation and their implementation in a numerical code are described, and some results are shown. We also present some computations of the photocenter displacement produced by extended objects having a given surface luminosity distribution, corresponding to asteroids obeying different possible scattering laws. A major application of our numerical simulator is to carry out a quantitative analysis of the actual capability of GAIA to obtain direct and accurate measurements of the apparent angular sizes of detected asteroids.


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    Title :

    Numerical simulations of asteroid signals on the GAIA focal plane


    Contributors:

    Published in:

    Advances in Space Research ; 38 , 9 ; 1961-1967


    Publication date :

    2005-10-11


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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