Towards Sub-meter Positioning using Android Raw GNSS Measurements

Dimitrios Psychas, Jon Bruno, Lotfi Massarweh, Francesco Darugna

Abstract: This paper presents a first analysis on the positioning performance using raw GNSS dual-frequency measurements acquired by the Xiaomi Mi 8 smartphone. In our study, we used the code-only-based Single Point Positioning technique for epoch-by-epoch positioning, and the Precise Point Positioning technique, which is based on both code and carrier-phase measurements, on precise satellite orbit and clock corrections, as well as on a dynamic model to exploit the time-constant property of the phase ambiguities. The functional model used in both our own SPP and PPP algorithms is based on the uncombined GNSS observation equations. As the Xiaomi Mi 8 smartphone is able to track both GPS and Galileo systems in two frequencies, we will present results based on single and combined GNSS solutions in single- and dual-frequency mode. The performance of these solutions will be assessed in terms of their repeatability and accuracy with respect to the ground-truth, while the improvement in Android-based positioning with multiple frequencies and GNSSs will be assessed compared to the GPS L1-only SPP case. An optimal combination of the elevation cut-off angle and the carrier-to-noise density ratio mask will be explored in order to have a reasonable balance between availability and quality of observations. Both real-time and post-processing positioning results will be presented.
Published in: Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019)
September 16 - 20, 2019
Hyatt Regency Miami
Miami, Florida
Pages: 3917 - 3931
Cite this article: Psychas, Dimitrios, Bruno, Jon, Massarweh, Lotfi, Darugna, Francesco, "Towards Sub-meter Positioning using Android Raw GNSS Measurements," Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), Miami, Florida, September 2019, pp. 3917-3931.
https://doi.org/10.33012/2019.17077
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