From: "Jim Ray" <jray@bipm.org>
To: <igsmail@igscb.jpl.nasa.gov>, <slrmail@dgfi.badw-muenchen.de>,
   <ivsmail@ivscc.gsfc.nasa.gov>, <dorismail@ensg.ign.fr>
Subject: No 0276 : EGU Session on Reference Frame, Fluids, & Combinations
Date: Fri, 28 Nov 2003 11:31:25 +0100
Message-ID: <000c01c3b59a$c96ab330$e57f68c1@TAI20>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
Importance: Normal

******************************************************************************
DORISMail               28-Nov-2003 10:17:48                   Message No 0276
******************************************************************************

Author: "Jim Ray" <jray@bipm.org> 
Subject: EGU Session on Reference Frame, Fluids, & Combinations 

Author: Jim Ray & Zuheir Altamimi

    EGU 1st General Assembly -- Nice, France, 25-30 April 2004
             http://www.copernicus.org/EGU/ga/egu04/

Dear Colleagues,

The 1st General Assembly of the European Geosciences Union will be
held in Nice, France, 25-30 April 2004.  We draw your attention in
particular to session "G7 - Reference Frame Definition, Influence
of Geophysical Fluids, and Combination of Space Geodesy Techniques":

When the development of space geodetic techniques allowed tectonic
motions to be routinely detectable, it became clear that global
Earth-fixed reference frames could no longer be treated as static.
Linear motion models were introduced in the 1980s, which served
among other things to verify the theory of global plate tectonics.

More recently, higher order (non-tidal) variations within the
terrestrial frame are receiving growing attention as the temporal,
spatial, and accuracy resolutions provided by geodetic data improve.
For instance, the coupling of coherent deformations in the geodetic
networks with gravity field variations could provide insight into
large-scale fluid mass movements, an important aspect of understanding
global change.

To fully utilize such results for integrated Earth science
applications, however, requires separating complicating effects such
as highly localized motions (subsidence, tracking station problems,
small-scale geophysical phenomena) and technique-related systematic
errors (long wavelength GPS orbit errors, propagation correction
errors, antenna model limitations).

Combining results from independent techniques must be an essential
part of the analysis process but doing so meaningfully in a
time-series mode increases the requirements for careful cooperation
and coordination.  This symposium aims to illuminate all aspects of
this complex, highly coupled problem.  Papers are especially sought
which study combinations of diverse data sets, particularly
ground-based with space-based observations.

Important Dates:
31 December 2003:  Early Bird registration
01 January  2004:  Deadline for support applications
11 January  2004:  Deadline for receipt of abstracts
08 April 2004:     Deadline for pre-registration & hotel booking

Please consider submitting a paper to this symposium or contact us
directly if you have any questions.

Sincerely,

Jim Ray, jray@bipm.org
Bureau International des Poids et Mesures & National Geodetic Survey

Zuheir Altamimi, altamimi@ensg.ign.fr
Institut Geographique National