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Proceedings Paper

White-light modeling, algorithm, development, and validation on the micro-arcsecond metrology testbed
Author(s): Mark H. Milman; Martin Regher; Tsae-Pyng Janice Shen
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Paper Abstract

The Space Interferometry Mission (SIM), scheduled for launch in early 2010, is an optical interferometer that will perform narrow angle and global wide angle astrometry with unprecedented accuracy, providing differential position accuracies of 1 uas, and 4 uas global accuracies in position, proper motion and parallax. SIM astrometric measurements are sythesized from pathlength delay measurements provided by three Michelson-type, white light interferometers. Two of the interferometers are used for making precise measurements of variations in the spacecraft attitude, while the third interferometer performs the science measurement. The ultimate performance of SIM relies on a combination of precise fringe measurements of the interfered starlight with picometer class relative distance measurements made between a set of fiducials that define the interferometer baseline vectors. The focus of the present paper is on the development and analysis of algorithms for accurate white light estimation, and on the preliminary validation of these aglorithms on the MicroArcsecond Testbed.

Paper Details

Date Published: 20 October 2004
PDF: 10 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.550660
Show Author Affiliations
Mark H. Milman, Jet Propulsion Lab. (United States)
Martin Regher, Jet Propulsion Lab. (United States)
Tsae-Pyng Janice Shen, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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