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Global astrometry with the space interferometry missionThe prospects for global astrometric measurements with the space interferometry mission (SIM) are discussed. The SIM mission will perform four microarcsec astrometric measurements on objects as faint as 20 mag using the optical interferometry technique with a 10 m baseline. The SIM satellite will perform narrow angle astrometry and global astrometry by means of an astrometric grid. The sensitivities of the SIM global astrometric performance and the grid accuracy versus instrumental parameters and sky coverage schemes are reported on. The problems in finding suitable astrometric grid objects to support microarcsec astrometry, and related ground-based observation programs are discussed.
Document ID
19980039549
Document Type
Conference Paper
Authors
Boden, A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Unwin, S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Shao, M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Date Acquired
August 18, 2013
Publication Date
July 1, 1997
Subject Category
Astronomy
Distribution Limits
Public
Copyright
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