[IGSMAIL-4840]: AGU/CGU Special Session G08 Stable North America-Fixed Reference Frame

Mike Craymer craymer at nrcan.gc.ca
Fri Feb 13 10:11:12 PST 2004


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IGS Electronic Mail      13 Feb 10:11:43 PST 2004      Message Number 4840
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Author: Geoff Blewitt, Michael Craymer and William Holt

Dear IGS/CANSPACE Colleagues:
We invite you to consider contributing to the special session G08 "Towards a=
 Stable North America-Fixed Reference Frame" at the AGU/CGU/SEG Joint=
 Assembly in Montreal, May 17-21. 2004.

This session will address the pressing needs for a North America-fixed=
 reference frame that is stable at the sub-millimeter level, and what is=
 involved in defining a frame with such stability. Velocity solutions from=
 GPS networks covering the North America-Pacific plate boundary (including=
 the Plate Boundary Observatory under construction) are most naturally=
 expressed with respect to the stable interiors of either the North America=
 or Pacific plates. As well as providing a common frame by which to compare=
 results from different analysis groups, such a system makes it easier to=
 interpret the data in terms of where the total budget of relative plate=
 motion is accommodated, and how deep plate boundary dynamics penetrate into=
 the plate interior. Defining a stable frame at the sub-millimeter level=
 requires adequate characterization of kinematics at that level across a=
 sufficiently broad expanse of what may be termed the "plate interior,"=
 which deforms due to PGR and other mantle processes, coupled with=
 lithospheric heterogeneity. A dynamically defined velocity datum (as=
 opposed to a purely kinematic choice) is preferable to add interpretive=
 value to site velocities. We solicit presentations addressing any aspect of=
 what is required to realize a N.A. frame with such stability, including=
 required observations (old and new, geodetic and otherwise), kinematic=
 characterization, dynamic models, possible inferences from seismic=
 anisotropy, reference frame theory, and also on limiting factors that will=
 likely control the level of stability that might be achieved in the=
 foreseeable future. 

The deadline for on-line abstracts is 19 Feb 2004, 23:59 UT. For further=
 details go to <http://www.agu.org/meetings/sm04/program.shtml>.

Conveners:

Geoffrey Blewitt
University of Nevada, Reno
1664 N. Virginia Street Mail Stop 178
Reno, NV89557USA
1-775-784-6691
gblewitt at unr.edu

Michael Craymer
Natural Resources Canada, Geodetic Survey Division
615 Booth Street, Room 493
Ottawa, ONK1A OE9CAN
1-613-947-1829
craymer at nrcan.gc.ca

William Holt
State University of New York at Stony Brook
Department of Geosciences
Stony Brook, NY11794-2100USA
1-631-632-8215
wholt at mantle.geo.sunysb.edu



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