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A system for combining laser ranging and high-speed optical communication reception into a single optical system for low-Earth orbit satellite applications at 1550 nm is proposed. This system would enable both optical data reception and ranging to be performed at one location, provided a satellite has both an SDA-compliant optical terminal and infrared retroreflectors on-board. An analysis of the expected returns is provided for both ideal and poor atmospheric conditions. The ranging system is projected to have a single-shot precision of 2.7 cm with sub-mm normal point accuracy pending further analysis. A system concept is presented, utilizing a single telescope and the same adaptive optics. Other methods of orbit determination using optical techniques are also identified. A proof-of-concept system will be considered for payload testing on the University of Alberta AlbertaSat’s Ex-Alta 4 cubesat, scheduled for launch in 2027-28.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Erik F. Halliwell, K. Steven Knudsen, Ian R. Mann, "Dual-purpose SDA-compliant optical ground station and laser ranging system concept for satellite applications," Proc. SPIE 12877, Free-Space Laser Communications XXXVI, 128771P (12 March 2024); https://doi.org/10.1117/12.3001892