1. SOPAC Reanalysis for SNARF and Web-based Analysis Tools Yehuda Bock, Peng Fang, Linette Prawirodirdjo, Paul Jamason, Ruey-Juin Chang, Ian Macleod, George Wadsworth Scripps Orbit and Permanent Array Center University of California San Diego Frank Webb, Sharon Kader, Danan Dong Jet Propulsion Laboratory, NASA 8th SNARF workshop, AGU Special Session, San Francisco, Dec. 12, 2007

2. Data Set Global –IGS (385) –ITRF2005 (302 with 252 overlap with IGS) –TIGA (161 out of 276) –VLBI/SLR collocated (114 out of 137) –Doris (30 out of 30) Total 435 (current) Regional (northern America) –SCIGN –PBO –Others Total 1121 (current)

3. SOPAC global solutions (ITRF2005, IGS)

4. SOPAC regional solutions (NA continental) 2007.9

5. SOPAC regional solutions (Alaska) 2007.9

6. SOPAC regional solutions (NA continental) 2000.0

7. SOPAC regional solutions (Alaska) 2000.0

8. Data Processing Strategy (main differences from previous solutions) Reference frame iterf2005 Antenna phase center model Absolute (IGS) Tropospheric model Vienna tropo. Mapping function Ocean tidal loading model FES2004 with CMC correction Differential code biases DCB for receivers and satellites (IGS) Updated software package GAMIT/GLOBK 10.32 Improved ambiguity resolution Extra data sets TIGA, VLBI-SLR collocated, DORIS

9. Apriori. orbits Apriori. EOP OTL model DCB table Ant phs center model Apr. coordinates Aux. tables Orb/EOP constraints Ref frame constraints GAMIT Daily global subnet solutions GLOBK Daily combination weekly combination GAMIT Daily global subnet solutions GAMIT Daily regional subnet solutions GAMIT MATLAB or St_filter Spatial filtering Loosely constrained solutions Archive rinex/solutions Web publication Web tools Position/time series Position/time series Velocities Velocities Strain/strain rate Strain/strain rate Model terms Model terms  Seasonal  Statistical property User application control Reference frame definition Reference frame definition  Selecting sites  Setting constraints Spatial filtering Spatial filtering Model parameter derivation Model parameter derivation SOPAC Services

10. GPS Analysis tools Select sites (SOMI map based)Select sites (SOMI map based) –Bounding box (with/without restrictions) –Site group (with/without restrictions) CoordinatesCoordinates Time seriesTime series VelocityVelocity Time series fittingTime series fitting Spatial filteringSpatial filtering MappingMapping Crustal modelingCrustal modeling

12. Site selection

13. Site coordinates

18. Click Image for Animated Movie