Journal
NEW ASTRONOMY REVIEWS
Volume 53, Issue 11-12, Pages 344-352Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.newar.2010.07.004
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Funding
- National Aeronautics and Space Administration
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Narrow-angle dual-star interferometric astrometry can provide very high accuracy in the presence of the Earth's turbulent atmosphere. However, to exploit the high atmospherically-limited accuracy requires control of systematic errors in measurement of the interferometer baseline, internal OPDs, and fringe phase. In addition, as high photometric SNR is required, care must be taken to maximize throughput and coherence to obtain high accuracy on faint stars. This article reviews the key aspects of the dual-star approach and implementation, the main contributors to the systematic error budget, and the coherence terms in the photometric error budget. (C) 2010 Elsevier B.V. All rights reserved.
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