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Boot strapping star position and baseline knowledge with uncalibrated SIM observations.

Boot strapping star position and baseline knowledge with uncalibrated SIM observations.

Catanzarite, Joe; Basdogan, Ipek; Milman, Mark H.
URI: http://hdl.handle.net/2014/39341
Date: 2002-08-22
Keywords: Space Interferometry Mission (SIM); ; calibration; astrometry
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2002.
Citation: SPIE's Astronomical Telescopes and Instrumentation, Waikola, Hawaii, August 22-28, 2002.

Abstract:

An external calibration technique for SIM involves measurement of calibration stars whose positions must already be known to an accuracy of 2 milliarcseconds. We demonstrate a procedure that effectively "bootstraps" calibration star positions from an ab initio catalog to the required accuracy by observing them with the uncalibrated SIM instrument.

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