9 August 2016 Nanoradian ground-based astrometry, optical navigation, and artificial reference stars
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Abstract
Spacecraft carrying optical communication lasers can be treated as artificial stars, whose relative astrometry to Gaia reference stars provides spacecraft positions in the plane-of-sky for optical navigation. To be comparable to current Deep Space Network delta-Differential One-way Ranging measurements, thus sufficient for navigation, nanoradian optical astrometry is required. Here we describe our error budget, techniques for achieving nanoradian level ground-base astrometry, and preliminary results from a 1 m telescope. We discuss also how these spacecraft may serve as artificial reference stars for adaptive optics, high precision astrometry to detect exoplanets, and tying reference frames defined by radio and optical measurements.
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Chengxing Zhai, Chengxing Zhai, Michael Shao, Michael Shao, Abhijit Biswas, Abhijit Biswas, Todd Ely, Todd Ely, Christopher Jacobs, Christopher Jacobs, Joseph Lazio, Joseph Lazio, Tomas Martin-Mur, Tomas Martin-Mur, William Owen, William Owen, Mike Rud, Mike Rud, Navtej Saini, Navtej Saini, Jagmit Sandhu, Jagmit Sandhu, Slava Turyshev, Slava Turyshev, Thomas Werne, Thomas Werne, } "Nanoradian ground-based astrometry, optical navigation, and artificial reference stars", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99085B (9 August 2016); doi: 10.1117/12.2233689; https://doi.org/10.1117/12.2233689
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