Reanalysis of GPS Data at Tide Gauges and the Combination for the IGS TIGA Pilot Project

The purposes and algorithms of the reanalysis of GPS data at tide gauge benchmarks are described. GPS data from the global network of 403 stations from March 1998 till December 2007 have been reprocessed at GFZ to derive a weekly time series of station coordinates within the IGS GPS Tide Gauge Benchmark Monitoring Pilot Project (TIGA). The combination procedure and some results of the combination and comparison of the solutions derived at six TIGA analysis centres are provided.