Numerical simulations of asteroid signals on the GAIA focal plane

Details Numerical simulations of asteroid signals on the GAIA focal plane Numerical simulations of asteroid signals on the GAIA focal plane

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006adspr..38.1961d&link_type=abstract

Advances in Space Research, Volume 38, Issue 9, p. 1961-1967.

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We 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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