Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5497..577m&link_type=abstract
Modeling and Systems Engineering for Astronomy. Edited by Craig, Simon C.; Cullum, Martin J. Proceedings of the SPIE, Volume 549
Astronomy and Astrophysics
Astronomy
1
Scientific paper
In this paper we discuss the use of an innovative SIM simulator, called SIMsim, to perform end-to-end simulations of the SIM mission. The inputs to the simulator are a physically-based parameterization of the major SIM error sources and the output is the mission astrometric accuracy for various observing scenarios such as narrow-angle (NA) and wide-angle (WA) observations. The primary role of SIMsim is to validate the SIM astrometric error budget (AEB), but it is also being used to study a variety of mission performance issues as well as being a test-bed for prototype data reduction algorithms. SIMsim is giving us confidence that the SIM AEB is a valid estimate of mission performance. It also is illustrating where analytical formulas for estimating certain effects breakdown and a numerical approach has to be adopted.
Meier David L.
Murphy David W.
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