HR: 08:00h
AN: G41A-01    [Abstracts]
TI: Plate Boundary Observatory (PBO): A large Geodetic Network on the Pacific-North America Plate Boundary
AU: Herring, T A
EM: tah@chandler.mit.edu
AF: MIT, 54-820, Cambridge, MA 02139, United States
AU: * King, R W
EM: rwk@chandler.mit.edu
AF: MIT, 54-820, Cambridge, MA 02139, United States
AU: McClusky, S C
EM: simon@chandler.mit.edu
AF: MIT, 54-820, Cambridge, MA 02139, United States
AU: Santillan, V M
EM: marcelo@geology.cwu.edu
AF: CWU, 400 East University Way, Ellensberg, WA 98926, United States
AU: Melbourne, T I
EM: tim@geology.cwu.edu
AF: CWU, 400 East University Way, Ellensberg, WA 98926, United States
AU: Murray, M H
EM: murray@ees.nmt.edu
AF: NMT, 801 Leroy Place, Socorro, NM 87801, United States
AU: Anderson, G J
EM: anderson@unavco.org
AF: UNAVCO, 6350 Nautilus Drive, Boulder, CO 80301, United States
AB: The Plate Boundary Observatory is being installed along the Pacific-North America plate boundary and when complete will add 875 new GPS sites and incorporate 209 existing GPS sites into the network. The GPS phase data from all these sites and an additional 40 sites to tie to the North America plate are analyzed by PBO analysis centers (ACs) at the New Mexico Institute of Mining and Technology (NMT) and at Central Washington University (CWU). The results from the two ACs, which use different GPS data processing programs, are combined into PBO GPS products by the Analysis Center Coordinator (ACC) at the Massachusetts Institute of Technology. Three levels of analysis are performed on the data: a "rapid" analysis available with a 1-day latency; a "final" analysis that uses IGS final orbit products and is available with a 6-13 day latency; and a "supplemental" analysis that runs with 12-week latency and adds to the final analysis data from sites with late data retrieval. Results from these analyses in the form of velocity estimates, time series, and Solution Independent Exchange Format (SINEX) files that contain position and full covariance information are all available from http:pboweb.unavco.org/gps_data. The median root-mean-square (RMS) scatter of the daily estimates from currently about 800 stations in a North America fixed reference frame from the final analysis is 1.3 mm horizontal position and 4.0 mm in vertical position. We discuss the results being obtained from the PBO analyses and the methods used to process the GPS data from this network.
UR: http:pboweb.unavco.org
DE: 1229 Reference systems
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 1241 Satellite geodesy: technical issues (6994, 7969)
SC: Geodesy [G]
MN: 2007 Joint Assembly