Modelling of a space-based ronchi ruling experiment for high-precision astrometry |
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| Authors: | S Shaklan S Pravdo G Gatewood C Ftaclas |
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| Institution: | (1) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA;(2) Allegheny Observatory, Observatory Station, Pittsburgh, Pennsylvania, USA;(3) Hughes Danbury Optical Systems, Inc., Danbury, Connecticut, USA |
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| Abstract: | An end-to-end modelling program for an astrometric telescope employing a Ronchi ruling has been developed. The program models the aberrated images formed anywhere in the field-of-view. It then determines apparent centroids by simulating the motion of a Ronchi ruling across the field. Photo-electron statistics are included. A 6-term plate-constant model is used to determine the apparent motion of a target star within a reference frame as the object is re-observed through both ideal and perturbed optics. The modelling code is accurate at the submicroarcsecond level.Paper presented at the Conference on Planetary Systems: Formation, Evolution, and Detection held 7–10 December, 1992 at CalTech, Pasadena, California, U.S.A. |
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