On the Path to Precision - Observations with Android GNSS Observables

Stuart Riley, Will Lentz and Adam Clare

Abstract:	The introduction of an Android API that provides access to GNSS measurements opens the possibility of precision GNSS navigation on smartphones and tablets. There are, however, significant challenges to obtain precise positions with the current and near future generation of phones since these devices use low cost L1 only GNSS chipsets, have antennas that are optimized for cellular rather than GNSS signal reception and typically do not provide access to continuous carrier phase measurements. The phone antenna is perhaps the biggest challenge since, compared to a typical GNSS antenna, the antenna is often linearly polarized rather than right hand circular polarized thus reducing the signal strength and the reception pattern is spherical rather than hemispherical substantially increasing the potential for multipath. Using data collected from a variety of devices this paper will explore the quality of the measurements and what is possible from a precision engine using Android GNSS measurements.
Published in:	Proceedings of the 30th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2017) September 25 - 29, 2017 Oregon Convention Center Portland, Oregon
Pages:	116 - 129
Cite this article:	Riley, Stuart, Lentz, Will, Clare, Adam, "On the Path to Precision - Observations with Android GNSS Observables," Proceedings of the 30th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2017), Portland, Oregon, September 2017, pp. 116-129. https://doi.org/10.33012/2017.15244
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