Satellite positioning is one of the basic needs of our modern society. There are a vast number of applications that millions of people use every day. Four systems, including GPS and Galileo, are collectively known as the GNSS (Global Navigation Satellite Systems). The infrastructure enabling GNSS positioning is mostly invisible to the user. This includes the navigation satellites, their signals and signal processing, geodetic reference frames, and ground-based geodetic networks that enable the precise use of GNSS positioning.
In recent years, we have seen an increasing number of cases where GNSS positioning has been disturbed, either intentionally or for natural reasons. In this seminar, we will discuss the threats and vulnerabilities of GNSS positioning and ways to detect and mitigate them. Welcome to hear and discuss the topic.
Time: Wednesday, 18 September 2024, 16:00-19:00
Venue: Finnish Academy of Science and Letters (Mariankatu 5 A, 2nd floor, Helsinki)
Organizer: Group of Geosciences, Finnish Academy of Science and Letters
Pre-registration: by 16 September: electronic form (please see below) or emilia.lahde@acadsci.fi / 050 512 8830
The seminar is open to the public, welcome! The attendance capacity is for 40 participants. The seminar will be held in English. Coffee and snacks are provided.
Programme
Opening
Petri Pellikka, Professor, University of Helsinki, Earth Change Observation Lab
Global Navigation Satellite Systems: yesterday, now, tomorrow
Markku Poutanen, Professor emeritus, Finnish Geospatial Research Institute FGI of the National Land Survey
Principles and performance of network RTK (real-time kinematic) GNSS positioning: case active ionosphere
Hannu Koivula, Professor, Finnish Geospatial Research Institute FGI of the National Land Survey
Protecting GNSS from intentional interference
Laura Ruotsalainen, Professor, University of Helsinki, Department of Computer Science
Topographic influences on GNSS jamming signals
Hanna Lahtinen, MSc, University of Helsinki, Department of Geosciences and Geography
Indoor Positioning Using Acoustic Signals
Ruizhi Chen, Professor, Wuhan University, Director of the State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing