In the summer of 2001 University of Washington Earth and Space Sciences joined Rob McCaffrey and Charles Williams of Rensselaer Polytechnic in New York, as well as Herb Dragert of the Pacific Geoscience Centre in Victoria Canada in conducting a GPS campaign of many sites in Northern Oregon, northern and eastern Washington, and southern British Columbia. A list of station locations as well as a station map of sites surveyed in 2001 are available. Data from the network of permanent PANGA stations were also available during this period.
We used many volunteers from UW, Rensselaer, Pacific Geoscience Centre, as well
as volunteers from the community to operate the GPS receivers.
The main survey period was
Aug 6-23 but other sites were occupied later.
Sites were generally occupied for 8-10 hours during the day or at night.
Selected sites were occupied for multiple days. Many of the sites were
new for us but were occupied by the NGS in 1998. We established a number of
new sites by installing markers in bedrock. The surveys went fairly
smoothly except for some delays and heavy smoke caused by
fires in eastern Washington and Oregon.
For more general information on the use of GPS in the
Pacific northwest see
http://www.geophys.washington.edu/GPS/docs/general_info.html.
See the preliminary map of station velocities
to see some of the early results (prior to 2001) on how sites are moving in the
Pacific Northwest.
In 2001 we surveyed many sites that were surveyed by the
National
Geodetic Survey using GPS in 1998. This will allow us to see how much the
sites have moved. For example we
currently know little about how sites in NE washington are moving.
For an example of sites surveyed in previous years see the
map of stations surveyed in 2000.
Back to UW GPS Geodesy Homepage.
