GNSS raw measurements take centre stage at GSA workshop

18 June 2020
Stakeholders shared the latest knowledge around raw measurement use at the Raw Measurements Workshop
Stakeholders shared the latest knowledge around raw measurement use at the Raw Measurements Workshop

Over 200 participants from 32 countries took part in the fourth GNSS Raw Measurements Task Force Workshop, held online on 27-28 May 2020. At the workshop, participants had the opportunity to learn about progress around the use of raw measurements in Android devices and to benefit from the experience of the GSA’s Raw Measurements Task Force.

By sharing knowledge and experience around raw measurement use, the GNSS Raw Measurements Task Force Workshops increase the global understanding of raw measurements and advance the science and practice of implementing raw measurements in apps and devices. This year the event was online, with lively discussions held over the two days of the workshop.

Sharing knowledge

In his keynote presentation on May 27, Google`s Frank Van Diggelen spoke about updated Google tools for logging and analysing GNSS measurements, with new features already available in GnssLogger, such as logging in RINEX format or logging of other sensor data, or in GNSS Analysis software - such as new PVT filters or “select satellite for position”. Additional features (e.g. antenna phase centre offset), to be available with the Android 11 release in the third quarter of this year, were also highlighted.

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Discussions at the workshop confirmed that GNSS raw measurements are increasingly used in educational and scientific projects around the world, leading to increased knowledge and interest in GNSS technology and better implementation of GNSS within smartphones. In addition, there is already a growing body of evidence that sub-meter positioning is feasible in real-time with current smartphones when using RTK and other techniques. So, it is just a question of when, rather than if, it will become widely used. What’s more, test results from dual frequency chipsets presented at the workshop showed Galileo’s added-value in improving accuracy by reducing multipath.

“The Raw Measurements Task Force Workshop allows all stakeholders interested in raw measurement use to share their knowledge and experience and to ensure that the benefits of GNSS raw measurements are enjoyed by as many people as possible,” the GSA’s Head of Market Development Fiammetta Diani said in her welcome address. 

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Over 20 interesting presentations

The day concluded with presentations from Airbus (Tomasz Lewandowski) and ESA (Xurxo Otero) showing test results with dual-frequency smartphones and evaluation kits. There were also presentations from Qascom (Carlo Sarto) on future OS-NMA use in smartphones; the GSA (Joaquin Reyes) on how raw measurements improve the digitalisation of CAP controls; EC (Katarzyna Porzuc) on GNSS raw measurements in the context of ensuring caller location in emergency communications; and JRC (Maria Angeles Aragon) about the NeQuick-G algorithm.

On the second day of the workshop, when another eleven contributions were presented, Rokubun CTO Miquel Garcia-Fernandez spoke about WiFi RTT (Round Trip Time) measurements as the GNSS companion for Indoor Positioning. Regarding the workshop, he said: “After four editions, the GSA Raw Measurements Task Force has matured and has become a reference to be up to date in recent advances regarding GNSS data processing for mobile devices.”

“Its participants, from public institutions, academia, big companies as well as SMEs provide an updated and relevant snapshot of the GNSS community developing new location technology for smartphones,” Garcia-Fernandez said.

For an overview of all the presentations made at the workshop, click here.

Join the Task Force

The GNSS Raw Measurements Task Force is dedicated to promoting a better and wider use of GNSS raw measurements. 

Since its launch in 2017, the Task Force has expanded from a handful of experts to a community of over 100 agencies, universities, research institutes and companies. Membership is open to anybody interested in GNSS raw measurements. To join the Task Force contact:

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Updated: Jun 18, 2020