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Collaborative navigation as a solution for PNT applications in GNSS challenged environments: report on field trials of a joint FIG / IAG working group

Kealy, Allison; Retscher, Guenther; Toth, Charles; Hasnur-Rabiain, Azmir; Gikas, Vassilis; Grejner-Brzezinska, Dorota; Danezis, Chris; Moore, Terry


Allison Kealy

Guenther Retscher

Charles Toth

Azmir Hasnur-Rabiain

Vassilis Gikas

Dorota Grejner-Brzezinska

Chris Danezis

Terry Moore


PNT stands for Positioning, Navigation, and Timing. Space-based PNT refers to the capabilities enabled by GNSS, and enhanced by Ground and Space-based Augmentation Systems (GBAS and SBAS), which provide position, velocity, and timing information to an unlimited number of users around the world, allowing every user to operate in the same reference system and timing standard. Such information has become increasingly critical to the security, safety, prosperity, and overall qualityof-life of many citizens. As a result, space-based PNT is now widely recognized as an essential element of the global information infrastructure. This paper discusses the importance of the availability and continuity of PNT information, whose application, scope and significance have exploded in the past 10–15 years. A paradigm shift in the navigation solution has been observed in recent years. It has been manifested by an evolution from traditional single sensor-based solutions, to multiple sensor-based solutions and ultimately to collaborative navigation and layered sensing, using non-traditional sensors and techniques – so called signals of opportunity. A joint working group under the auspices of the International Federation of Surveyors (FIG) and the International Association of Geodesy (IAG), entitled ‘Ubiquitous Positioning Systems’ investigated the use of Collaborative Positioning (CP) through several field trials over the past four years. In this paper, the concept of CP is discussed in detail and selected results of these experiments are presented. It is demonstrated here, that CP is a viable solution if a ‘network’ or ‘neighbourhood’ of users is to be positioned / navigated together, as it increases the accuracy, integrity, availability, and continuity of the PNT information for all users.


Kealy, A., Retscher, G., Toth, C., Hasnur-Rabiain, A., Gikas, V., Grejner-Brzezinska, D., …Moore, T. (2016). Collaborative navigation as a solution for PNT applications in GNSS challenged environments: report on field trials of a joint FIG / IAG working group. Journal of Applied Geodesy, 9(4), 244-263.

Journal Article Type Article
Acceptance Date Oct 10, 2015
Online Publication Date Jan 21, 2016
Publication Date Jan 1, 2016
Deposit Date May 5, 2016
Publicly Available Date May 5, 2016
Journal Journal of Applied Geodesy
Print ISSN 1862-9016
Electronic ISSN 1862-9016
Publisher De Gruyter
Peer Reviewed Peer Reviewed
Volume 9
Issue 4
Pages 244-263
Keywords GNSS; ubiquitous positioning; continuous PNT; collaborative positioning; multi-sensor systems; integrated navigation
Public URL
Publisher URL
Related Public URLs
Additional Information Vol. 9 issue 4 is for Dec. 2015.


jag-2015-0014.pdf (5.1 Mb)

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