21 February 2003 Fringe envelope tracking at COAST
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Abstract
We report on a new fringe envelope tracking system installed at the Cambridge Optical Aperture Synthesis telescope (COAST). This currently uses the existing photon-counting avalanche photo diode (APD) detector system to allow real-time fringe tracking on up to 3 baselines simultaneously. This system has been recently tested on the sky and has proved to successfully track the fringe envelope on a 38m baseline. The algorithm based on an envelope method has also been implemented and tested at the Infrared-Optical Telescope Array (IOTA) interferometer.
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Nathalie D. Thureau, Roger C. Boysen, David F. Buscher, Christopher A. Haniff, Ettore Pedretti, Peter J Warner, John S. Young, "Fringe envelope tracking at COAST", Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); doi: 10.1117/12.459383; https://doi.org/10.1117/12.459383
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