Session topics

Session Programme

All presentations and posters will be available from the EUREF web site www.euref.eu/euref_symposia_meetings.html

Opening Session

Chair: NN

Session 1: Activities of the EUREF Technical Working Group

Chairpersons: Johannes Ihde, Carine Bruyninx

This session is dedicated to the activities of the EUREF Technical Working Group

Session 2: New developments in GNSS Networks

Chairpersons: Heinz Habrich, Alessandro Caporali

This session shows new developments in GNSS networks in the broadest sense. The presentations have a close relation to the EPN, but also other regional and global networks will be addressed. The term GNSS network considers aspects of tracking site operation, GNSS space/user segments as well as transferring and holding of GNSS observations and products. The deployment of twenty one operational GLONASS satellites in January 2011 and the announcement of the first GLONASS-K satellite launch using the GPS compatible CDMA signal modulation for 2011continues the development towards a multi-system satellite constellation. It will be augmented by the Galileo in orbit validation (IOV) phase providing the full spectrum of Galileo satellite signals and the further deployment of the Chinese COMPASS/Beidou constellation. The combination of various satellite systems evoked the development of enhanced data formats, such as RINEX version 3 for data files and the proposed “Multi-System Message” RTCM format for data streams. The extended satellite constellation asks station operators to install combined receivers that are capable to track GPS, GLONASS and Galileo signals. Furthermore new satellite signals such as L2C and L5 are now broadcasted by newly launched satellites. The potential of new satellite constellations and frequencies will be shown, as well as today’s realisation in GNSS networks. Real-time applications became a challenging tool during the last years. Technologies for streaming observation data, real-time analysis of data and providing the products, such as satellite orbits and clocks, in real-time are now operational ( e.g., the IGS Real Time Pilot Project with contributions from EUREF, or the BNC software). Experiences in operating a network of stations that make their data available in real-time and applications of real-time products will be discussed.

Session 3: Modelling the Earth with GNSS

Chairpersons: Jan Dousa, Rui Fernandes

Latest improvements in modelling the lower and upper atmosphere proved that GNSS could serve as a valuable and efficient tool for sensing the Earth atmosphere for various purposes - numerical weather prediction, climate study, space weather monitoring etc. With advanced technology, new analysis models and efficient techniques, the monitoring of the solid Earth deformations or variations in the liquid Earth provides further expectation on GNSS in future too. The session solicits contributions with new achievements in modelling/monitoring the solid and liquid Earth and its atmosphere with GNSS, contributions demonstrating new approaches and products, their validation and exploitation.

Session 4: Mitigation of GNSS error sources

Chairpersons: Elmar Brockmann, Günter Stangl

Site effects and propagation effects still control the accuracy with which GNSS phase tracking data can be modelled. Site effects address the displacements of the physical position of the GNSS antenna, and therefore include monumentation, antenna calibration, tidal displacements and surface mass loading. Propagation effects address effects due to the troposphere, ionosphere or multipath. The influence of these effects on GNSS-derived products (such as station coordinates, station velocities, zenith total delay estimates for numerical weather prediction, troposphere horizontal gradients, etc.) is an area of advanced research. Some groups in Europe started with re-processing activities in the last years, in order to generate results which are based on an homogeneously set of models. A new special project within EUREF has recently be started in order to coordinate these activities.
The session solicits contributions focussing on the sources of systematic errors that limit the accuracy of GNSS products. We welcome papers with analyses and new ideas on how to calibrate or to prevent such systematic errors, or on techniques to recognize their signature in the data, and possibly minimize them. Also welcome are papers comparing results with results derived from other sources or results stemming from a re-processing.

Session 5: Height, Gravity, Geoid, and Combination of Techniques

Chairperson: Markku Poutanen, Jaakko Mäkinen

Gravity-related heights, i.e. heights based on potential differences remain fundamental. Definition and realization of the European Vertical Reference System (EVRS) is under way, and many countries are renewing or updating their height systems. Simultaneously, the realization of heights using 3-D coordinates and geoid models is continuously improving, supported by the gravity satellite missions GRACE and GOCE. Gravity methods are increasingly contributing to the maintenance of reference frames. Combining different techniques and data access in a systematized way will be done under the umbrella of the Global Geodetic Observation System GGOS and regionally, under the European Combined Geodetic Network ECGN.
We solicit papers on the definition and realization of height systems at the national, European and global level, on gravity-field modelling and geoid computations, on the use of gravity and multiple techniques in the maintenance of the reference frame. Especially welcome are papers on the contribution of EUREF to the ECGN or GGOS.

Session 6: Improvements and densification of ETRS89

Chairperson: João Torres, Martin Lidberg

The European Terrestrial Reference Frame (ETRS89) is currently the basis for geo-referencing in most of the European continent, and will play a key role in INSPIRE.
For this session the presentations will cover the following aspects:
- scientific and technical developments related to the improvement of ETRS89;
- presentation of GNSS campaigns as extensions and upgrades of the ETRF;
- practical developments for the adoption of ETRS89 at sub-regional and national level;
- developments and new implementations of the European Coordinate Reference Systems (CRS) Information and Service System.

Session 7: National Reports

Chairperson: Jan Krynski, Wolfgang Söhne

National surveying and mapping authorities of European countries report in this session on all branches of their activities, from geodetic surveying to the establishment of geometric reference systems and positioning, to gravimetric and height related tasks, and to outstanding developments in geo-information systems. The implementation of EUREF results on national level is of particular interest. Due to the limited time, which is typically only a few minutes for each country, the reports must focus on new developments since the last report given at a EUREF symposium.

Closing Session, Resolutions, EUREF Symposium 2011

Chair: NN, Mark Greaves, João Torres



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