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Modelling of a space-based ronchi ruling experiment for high-precision astrometry

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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.

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Authors and Affiliations

  1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

    S. Shaklan & S. Pravdo

  2. Allegheny Observatory, Observatory Station, Pittsburgh, Pennsylvania, USA

    G. Gatewood

  3. Hughes Danbury Optical Systems, Inc., Danbury, Connecticut, USA

    C. Ftaclas

Authors
  1. S. Shaklan
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  2. S. Pravdo
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  3. G. Gatewood
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  4. C. Ftaclas
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Shaklan, S., Pravdo, S., Gatewood, G. et al. Modelling of a space-based ronchi ruling experiment for high-precision astrometry. Astrophys Space Sci 212, 453–463 (1994). https://doi.org/10.1007/BF00984549

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  • DOI: https://doi.org/10.1007/BF00984549

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