9 August 2016 Nanoradian ground-based astrometry, optical navigation, and artificial reference stars
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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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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