IGS

International GNSS Service

Data Reprocessing Campaign

a first full reanalysis of all IGS GPS data collected since 1994

IGS
OBJECTIVE
The Analysis Centers (ACs) of the International GNSS Service are in the process of reanalyzing the full history of GPS data collected by the IGS global network since 1994 in a fully consistent way using the latest models and methodology. This is the first such full reprocessing by the IGS, but it is expected to be repeated in the future as further analysis changes are made.
SUMMARY
OF
PRODUCTS
The expected Analysis Center and combined IGS products include:
    daily GPS orbits & satellite clocks
    • 15-minute intervals (SP3c format)
    • satellite clocks in IGS timescale (loosely aligned to GPS time)
    daily satellite & tracking station clocks
    • 5-minute intervals (clock RINEX format)
    • in IGS timescale (loosely aligned to GPS time)
    daily Earth rotation parameters (ERPs)
    • from SINEX & classic orbit combinations (IGS erp format)
    • x & y coordinates of pole
    • rate-of-change of x & y pole coordinates
    • excess length-of-day (LOD)
    weekly terrestrial coordinate frames with ERPs
    • with full variance-covariance matrix (SINEX format)
    possible other products ?
    • ionosphere maps, tropospheric zenith path delays, etc
    • not part of this first campaign
ANALYSIS
CENTERS
The participating Analysis Centers contributing to this effort are:
    EMR — Natural Resources Canada, Canada
    • not contributing test solutions
    ESA — European Space Operations Centre (ESOC), ESA, Germany
    GFZ — GeoForschungsZentrum/Potsdam, Germany
    • not contributing test solutions
    JPL — Jet Propulsion Laboratory, USA
    • not contributing test solutions
    MIT — Massachusetts Institute of Technology, USA
    NGS — National Geodetic Survey, NOAA, USA
    • an updated test solution was submitted on 02 Jan. 2008
    PDR — GeoForschungsZentrum/Potsdam & Technical University of Dresden, Germany
    SIO — Scripps Institution of Oceanography, USA

Summaries of the analysis strategies and procedures for each AC are posted at the IGS Central Bureau. Submitted AC test solution files are posted at this GFZ site.

The product combination centers are: