GDOP of Navigation using Pseudorange and Doppler Shift from a LEO Constellation

Brian McLemore and Mark L. Psiaki

Abstract: A study is conducted on the Geometric Dilution of Precision (GDOP) for a navigation system leveraging carrier Doppler shift and pseudorange measurements from new massive Low Earth Orbit (LEO) constellations. The study develops a generalized GDOP analysis that can be used with both pseudorange and carrier Doppler shift data simultaneously. With the large number of LEO satellites being launched in the coming years, a multitude of signals that could be used for navigation will become available. The suitability of different constellations for navigation is investigated. Guidelines are developed that aid in determining when and how to effectively use the developed GDOP analysis.
Published in: Proceedings of the 34th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2021)
September 20 - 24, 2021
Union Station Hotel
St. Louis, Missouri
Pages: 2783 - 2803
Cite this article: McLemore, Brian, Psiaki, Mark L., "GDOP of Navigation using Pseudorange and Doppler Shift from a LEO Constellation," Proceedings of the 34th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2021), St. Louis, Missouri, September 2021, pp. 2783-2803. https://doi.org/10.33012/2021.18008
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