SIM white-light on-board processing algorithms

Details SIM white-light on-board processing algorithms SIM white-light on-board processing algorithms

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4852..731m&link_type=abstract

Interferometry in Space. Edited by Shao, Michael. Proceedings of the SPIE, Volume 4852, pp. 731-740 (2003).

Astronomy and Astrophysics

Astronomy

Scientific paper

The Space Interferometry Mission (SIM) is a space-based long baseline optical interferometer designed to perform precision astrometry to an unprecedented accuracy. Highly accurate white light fringe estimation is an important enabling technology for the success of SIM. To accomplish this, the combined light from the two arms of the interferometer is sent through a prism so that fringes formed at different wavelengths are dispersed across a number of spectral channels. The relative optical path difference (OPD) between the two arms is modulated so that an estimate of the phase in each of the channels can be obtained using phase shifting interferometry (PSI) techniques. The present paper presents several of the difficulties encountered in white light fringe estimation for SIM, and offers a number of alternatives for mitigating them.

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