[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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