28 July 2008 High-precision narrow angle astrometry with a space-borne interferometer
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This paper develops an observing and processing scheme for narrow angle astrometry using a single baseline interferometer without the aid of "grid" stars to characterize the interferometer baseline vector in inertial space. The basic concept derives from the recognition that over a narrow field the set of fundamental unknown instrument parameters that arise because the interferometer baseline vector has large uncertainties (since there are no grid star measurements) is indistinguishable from a particular set of unobservable errors in the determination of star positions within the field. Reference stars within the narrow field are used to circumvent these unobservable modes. Feasibility of the approach is demonstrated through analysis and example simulations.
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Mark H. Milman, David Murphy, "High-precision narrow angle astrometry with a space-borne interferometer", Proc. SPIE 7013, Optical and Infrared Interferometry, 701354 (28 July 2008); doi: 10.1117/12.790149; https://doi.org/10.1117/12.790149

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