Over the past decade, UNAVCO has been a key to the success of GPS as a leading technique for measuring present-day crustal motions thanks to its state-of-the-art scientific and technical support to the community and open data policy. This, in turn, has allowed major advances in our understanding of lithospheric deformation, from global plate motions to earthquake processes.

An even more exciting time is ahead of us, with, as a highlight, the Plate Boundary Observatory now funded through the Earthscope initiative. As a consequence, UNAVCO will have to move to the next level of scientific and technical services to the community to fully exploit PBO and the other components of Earthscope. UNAVCO can reinforce its ability to incorporate new technological developments, for instance by taking advantage of current developments in computer and information science to manage, exchange, and process massive data sets such as those provided by the continuously growing permanent GPS networks. UNAVCO can also help the community benefit from new advances in precise positioning and deformation measurement techniques, such as GPS-seismology, sea-floor geodesy, and GNSS capabilities. Similarly, radar interferometry and optical correlation techniques have clearly proven their complementary value to GPS for deformation measurements. UNAVCO is clearly a worldwide leader in its field but there is a potential for further international interactions that would consolidate access to new data sources and promote technology transfer and training.

I am strongly committed to contributing to the further success of UNAVCO, Inc., by strengthening its ability to provide the best possible service to the community.

Eric Calais Biography

-----------
Associate Professor, Dept. of Earth & Atmospheric Sciences, Purdue University
http://www.eas.purdue.edu/~calais

Education
---------
Ph.D. in Earth Sciences, University of Nice, France (1991)
M.Sc. in Earth Sciences, University of Brest, France (1988)
B.S. with distinction, Ecole Normale Superieure, Paris, France (1987)

Appointments
------------
2001 - present Associate Professor, Purdue University, West Lafayette, IN
1991 - 2001 Research Associate, CNRS, Nice, France
1994 - 1995 Research Fellow, Scripps Inst. of Oceanography, San Diego, CA
1992 - 1994 Post-doctoral Fellow, Scripps Inst. of Oceanography, San Diego, CA

Research interests
------------------
- Active crustal deformation processes: Geodetic measurements and
deformation models at time and space scales of the seismic cycle and
of plate boundary or intracontinental deformation. Current field
areas include the Caribbean, Central Asia, Alaska, the French Alps,
the Western Mediterranean.
- Atmospheric applications of GPS measurements: water vapor retrieval
and meteorology, detection of ionospheric acoustic and gravity wave
perturbations.
- Application of GPS geodesy to landslide monitoring and structural
engineering.

Synergistic activities
----------------------
2002-present: Member, Commission XIV of the International Association
of Geodesy.
1999-present: Member, Steering committee of the "Strain rate map
project", International Lithosphere Program.
1999-present: Member, Steering Committee of the AGRET Research Group
("Astrometry and Reference Systems), CNRS, France.
2000-2002: Member, Scientific Committee of the ECGS (European Center
for Geodynamics and Seismology, Luxembourg).

Selected Recent Publications
----------------------------
Calais, E., M. Vergnolle, J. Deverch�re, V. Sankov, A. Lukhnev, and
S. Amarjargal, Are post-seismic effects of the M=8.4 Bolnay
earthquake (July 12, 1905) still influencing GPS velocities in the
Mongolia-Baikal area?, Geophys. J. Int., 148, 1-12, 2002.

Calais, E., J.-M. Nocquet, F. Jouanne, and M. Tardy, Current
extension in the central part of the Western Alps from continuous GPS
measurements, 1996-2001, Geology, 30-7, 651-654, 2002.

Calais, E., Y. Mazabraud, B. Mercier de LŽpinay, P. Mann, G.
Mattioli,and P. Jansma, Strain partitioning and fault slip rates in
the northeastern Caribbean from GPS measurements, Geophys. Res.
Lett., 29(18), 1856, doi:10.1029/2002GL015397, 2002.

Ge, M., E. Calais, and J. Haase, Sensitivity of Zenith Tropospheric
Delay accuracy to GPS orbit errors and implications for
Near-real-time GPS meteorology, J. Geophys. Res., 107,
10.1029/2001LD001095, 2002.

Mann, P., E. Calais, J.-C. Ruegg, C. DeMets, T.H. Dixon, P.E. Jansma,
and G.S. Mattioli, Oblique collision in the northeastern Caribbean
from GPS measurements and geological observations, Tectonics,
10.1029/2001TC001304, 2002.

Nocquet, J.M., and E. Calais, The crustal velocity field in Western
Europe from permanent GPS array solutions, 1996-2001, Geophys. J.
Int., in press, 2003.

Calais, E., J. Haase, and B. Minster, Detection of ionospheric
perturbations using the SCIGN GPS array, Southern California,
Geophys. Res. Letters, in press, 2003.

Calais, E., M. Vergnolle, V. Sankov, A. Lukhnev, A. Miroshnitchenko,
S. Amarjargal, and J. Deverch�re, GPS measurements of crustal
deformation in the Baikal-Mongolia area (1994-2002): Implications for
current kinematics of Asia, J. Geophys. Res., in press, 2003.

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