GNSS positioning algorithms using methods of reference point indicators

Precise Point Positioning Using Triple GNSS Constellations in Various Modes

This paper introduces a new dual-frequency precise point positioning (PPP) model, which combines the observations from three different global navigation satellite system (GNSS) constellations, namely GPS, Galileo, and BeiDou. Combining measurements from different GNSS systems introduces additional biases, including inter-system bias and hardware delays, which require rigorous modelling. Our mod...

Achievable Positioning Accuracies in a Network of GNSS Reference Stations

Study and analysis of Differential GNSS and Precise Point Positioning

The Global Positioning system (GPS) is used for navigation and associated tasks in wide variety of applications. One of the primary modes of GPS operation is differential GPS. Differential GPS allows more accurate positioning than stand-alone GPS. Many new applications are possible because of the increased accuracy obtained through differential GPS. In this paper the techniques and methods of d...

Precise GNSS Positioning Using Smart Devices

The recent access to GNSS (Global Navigation Satellite System) phase observations on smart devices, enabled by Google through its Android operating system, opens the possibility to apply precise positioning techniques using off-the-shelf, mass-market devices. The target of this work is to evaluate whether this is feasible, and which positioning accuracy can be achieved by relative positioning o...

Precise Point Positioning: Is the Era of Differential GNSS Positioning Drawing to an End?

SUMMARY For three decades the differential GPS (DGPS), and subsequently DGNSS, technique has been the dominant operational mode for precise positioning for the geoscience, geospatial and navigation communities. All DGNSS techniques perform positioning relative to one or more reference GNSS receivers located at points of known coordinates. Depending upon the type of GNSS measurement, user equipm...