Multi-technique comparisons of 10 years of wet delay estimates on the west coast of Sweden

摘要: We present comparisons of 10-year-long time series the atmospheric zenith wet delay (ZWD), estimated using global positioning system (GPS), geodetic very long baseline interferometry (VLBI), a water vapour radiometer (WVR), radiosonde (RS) observations, and reanalysis product European Centre for Medium-Range Weather Forecasts (ECMWF). To compare data sets with each other, Gaussian filter is applied. The results from 10 GPS–RS sites in Sweden Finland show that full width at half maximum which standard deviation (SD) minimum increases distance between pair. Comparisons three co-located techniques (GPS, VLBI, WVR) result mean values ZWD differences level few millimetres SD less than 7 mm. best agreement seen GPS–VLBI comparison difference −3.4 mm an 5.1 over 10-year period. With respect to derived other techniques, positive bias up ~7 obtained ECMWF product. Performing on monthly basis, we find including RS or varies season, 3 15 GPS WVR does not have seasonal signature