ITRF 2000 Time Series

Subject: New ITRF2000 Time Series

SOPAC has completed a re-analysis with the GAMIT/GLOBK software suite of a large portion of the continuous GPS data stored in our archive from GPS week 0576 (January 21, 1991) to the present. The analysis performed in ITRF2000 provides a consistent set of data products spanning more than 11 years. These data products include precise GPS orbits in a variety of formats, EOP files, site coordinates, zenith delays, SINEX files, and modeled position time series.

EOP files are available at ftp://garner.ucsd.edu/pub/products/WWWW/sioWWWW7.erp.Z, where WWWW is the GPS week.

Zenith delays (estimates of global sites only) are available at ftp://garner.ucsd.edu/pub/combinations/WWWW/sioWWWW*.tro.Z.

SINEX files are available at ftp://garner.ucsd.edu/pub/combinations/WWWW/sioWWWW7.snx.Z.

As a new service, we are now providing in ASCII format the position time series of all the permanent GPS stations analyzed at SOPAC. Both a standard time series display and a java display are available to visualize and download time series on a site-by-site basis through our Web interface. In addition, four tar files, each comprised of all available sites, may be downloaded from the time series directory: raw Cartesian XYZ, raw NEU (North, East, Up), unfiltered NEU, and filtered NEU. The NEU tar files also contain tables of offset corrections applied and outliers removed.

For sites in the western United States, regional filtered time series are also available. This includes sites in the BARGN, BARD, EBRY, PANGA, and SCIGN permanent GPS networks, and western U.S. sites in the CORS network.

The regional filtering is carried out in space domain. By stacking the time series from a group of core sites, a time series containing common noises for the region can be derived, which will then be subtracted from individual time series to improve positional estimates. Unfiltered time series are also available for these sites. For all other sites, only unfiltered time series are available. No regional filtering is performed for these sites.

Please contact the webmaster if you have any questions.