Satellite Constellation Dependent Periodicities in PCC Models

GNSS derived position time-series have many short-and long-periodic variations. These periodicities are common to processing of different types of GNSS (GPS, GLONASS) measurements. The origin of these oscillations in the positioni time-series may have many reasons. In this paper, satellite constellation dependent periodicities in phase center correction (PCC) models were analyzed. To provei that the periodic signals in GPS (or GLONASS) derived position time-series are relatedi to the imperfection in satellite constellation dependenti PCC models, calculation of Lomb-Scargle spectrum was performed. In analyses the data of six selected ASG-EUPOS stations were used. Using spectral analysis, it was found that there is visible periodicity in satellite constellation dependent PCC models. The results show that the periodic signals observed in the GPS (or GLONASS) derived position time-series could be the result of imperfection in elevation or elevation and azimuth dependent error sources modeling.