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Remarks:  (1) IGS and regional data are analyzed with the GAMIT software
              using a two-tier (global and regional) distributed processing
              scheme. The global data are analyzed in one or more subnetworks
              and combined using the GLOBK software to compute precise orbits.
              These are tightly constrained in separate GAMIT solutions:
                (1) California regional SCIGN (ambiguities fixed)
                (2) California regional BARD (ambiguities fixed)
                (3) North America CORS (ambiguities free)
                (4) Western Europe EURA (ambiguities free).   
              The weekly solution reported here is generated by GLOBK,
              combining all global and regional daily solutions. 
          (2) The site coordinate repeatabilities reported in this newsletter
              are the direct results of the GLOBK adjustment. We then apply
              a filter to remove a common-mode position error from the
              California sites. The filtered series are available through
              the SOPAC Home Page at:
              http://sopac.ucsd.edu/cgi-bin/refinedJavaTimeSeries.cgi
          (3) SCIGN - Southern California Integrated GPS Network
              BARD - Bay Area Regional Deformation Array (Northern California)
              CORS - Continuously Operating Reference Stations (United States)