Towards sub-meter positioning using Android raw GNSS measurements

Dimitrios Psychas, Jon Bruno, Lotfi Massarweh, Francesco Darugna

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

22 Citations (Scopus)


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.
Original languageEnglish
Title of host publicationProceedings of the 32nd International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS+ 2019
PublisherION - Inst. of Navigation
Number of pages15
ISBN (Electronic)0936406232, 9780936406237
Publication statusPublished - 2019
EventION GNSS+ 2019 - Hyatt Regency Miami, Miami, United States
Duration: 16 Sep 201920 Sep 2019


ConferenceION GNSS+ 2019
Country/TerritoryUnited States
Internet address


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