Meeting Topics


Sessions have been designed to address the most relevant questions—not simply reporting results. These questions that define the priorities for advancing the science have been vetted by the session chairs and invited speakers, all experts in the field.

Session 1: Theory and Concepts

Session Chairs:
Zuheir Altamimi (Institute National de l’Information, LAREG, France)
Athanasios Dermanis (Aristotle University of Thessaloniki, Greece)

Questions to be addressed by presentations in this session: 

  • Are present reference frame theory and concepts adequate for current measurement accuracy and all types of station position time variations?
  • How well do the concepts match current practice (e.g., UTC/Terrestrial time versus geocentric time)? Are changes needed?
  • What about the mismatch between long-term linear theoretical frames and the reality of constantly moving stations? Is a new conceptual framework needed?
  • To what extent are fundamental physical standards limiting, e.g., the presentrelativistic formulation, the time-variable gravity field and the present inaccuracy of geocenter and geocenter motion?

Session 2: Geodetic Measurement Techniques

Session Chairs:
Tom Herring (MIT, MA, USA)
Jim Ray (NOAA, National Geodetic Survey, MD, USA)

Questions to be addressed by presentations in this session: 

  • How can the strengths and weaknesses of current technologies be better meshed to improve the ITRF?
  • What are the present leading geophysical model limitations and how can they be improved?
  • How do we ensure consistency of geophysical model application among  different techniques?
  • How can we best cope with the rapidly expanding volume of geodetic data (esp. GNSS data)?
  • Should more synergistic and multi-technique analysis approaches be promoted for  the future?
  • How do we precisely quantify the limiting factors of the legacy network and optimally deploy next generation systems?

Session 3: Regional Reference Frames

Session Chairs:
Richard Wonnacott (National Geospatial Information, Mowbray, South Africa)
John Dawson (Geoscience Australia, Australia)

Questions to be addressed by presentations in this session: 

  • Is there a future role for sub-global reference frames of high accuracy?
  • If the main justification for regional frames is to remove large- scale tectonic effects, how well can this really be done? What about residual motions?
  • How should national and regional frame efforts be best coordinated?

Session 4: Celestial to Terrestrial Frame Transformations

Session Chairs:
Johannes Boehm (Technical University Vienna, Austria)
Sebastian Lambert (l’Observatoire de Paris, France)

Questions to be addressed by presentations in this session:

  • Can the value of EOPs as monitors of global variations of the Earth system be improved (e.g., better accuracy, higher temporal resolution)?
  • Is additional, non-geodetic data needed to achieve greater insight or value? If so, what types?
  • Is the current array of observing systems evolving towards an optional delivery of EOP results or are changes needed?
  • Is the interaction between the geodetic EOP community and groups engaged in modelling large-scale terrestrial fluids adequate?
  • Can the benefits to both sides be improved?
  • How can the current ICRF implementation made consistent with the ITRF and EOPs and what is the current level of consistency?
  • What is the needed level of consistency from the ICRF user applications’ point of view?

Session 5: Usage and applications of reference frames in Geosciences

Session Chairs:
Richard Gross (NASA Jet Propulsion Laboratory, CA, USA)
Tonie van Dam (FSTC, University of Luxembourg, Luxembourg)

Questions to be addressed by presentations in this session:

  • In what ways are geoscience and geophysical applications under-served by the present geodetic system?
  • Are large-scale shifts in emphasis needed or beneficial?
  • What are the major questions of geoscience that are not currently well addressed by the geodetic observing systems?
  • What is the required accuracy of all types of geodetic products needed?
  • How best to integrate geodetic and gravimetric systems?
  • How to maintain a suitable balance between societal needs (e.g., natural hazard monitoring) and basic scientific goals?

Session 6: Georeferencing in Practice

Session Chairs:
Chris Rizos (School of Civil & Environmental Engineering
Uni. NSW, AU)
Mikael Lilje (Geodesy Department, Lantmäteriet, Sweden)

Questions to be addressed by presentations in this session:

  • How can we make the best of the development of geodetic infrastructure created by both commercial and governmental parties?
  • How can we make sure that national and regional realizations of ITRF are homogenous and traceable?
  • How can conflicts of interest be minimized?
  • How do we join forces in an optimal way concerning the development of GNSS and reference frames both globally and nationally?
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