White-light modeling, algorithm, development, and validation on the micro-arcsecond metrology testbed

Mark H. Milman; Martin Regher; Tsae-Pyng Janice Shen

doi:10.1117/12.550660

20 October 2004 White-light modeling, algorithm, development, and validation on the micro-arcsecond metrology testbed

Mark H. Milman, Martin Regher, Tsae-Pyng Janice Shen

Proceedings Volume 5491, New Frontiers in Stellar Interferometry; (2004) https://doi.org/10.1117/12.550660
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

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.

Citation Download Citation

Mark H. Milman, Martin Regher, and Tsae-Pyng Janice Shen "White-light modeling, algorithm, development, and validation on the micro-arcsecond metrology testbed", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); https://doi.org/10.1117/12.550660

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