Satellite Constellation Dependent Periodicities in PCC Models

Abstract

GNSS derived positioni time-series have many short-and long-periodici variations. These periodicities are commoni to processing of differenti types of GNSS (GPS, GLONASS) measurements. The origini of these oscillations in the positioni time-series may have many reasons. In this paper, satellite constellationi dependent periodicities in phase center correction (PCC) models were analyzed. To provei that the periodic signals in GPS (or GLONASS) derivedi position time-series are relatedi to the imperfectioni in satellite constellation dependenti PCC models, calculationi of Lomb-Scargle spectrumi was performed. In analyses the datai of six selectedi ASG-EUPOS stations were used. Usingi spectral analysis, it was foundi that there is visible periodicity in satellitei constellation dependenti PCC models. The results showi that the periodic signals observedi in the GPS (or GLONASS) derivedi position time-series couldi be the result of imperfectioni in elevation or elevationi and azimuth dependenti error sourcesi modeling.