Precise Orbit Determination of GOCE based on GNSS observations

Abstract

The geometrical point-wise satellite positions can be derived by GNSS (Global Navigation Satellite System) analysis techniques. Based on only geometrical high- low Satellite to Satellite Tracking (hl-SST) between GNSS satellites and LEO (Low Earth Orbiter), the absolute positions are estimated and defined as geometrical POD (GPOD). In this paper, the zero differenced estimation procedure will be applied to GOCE (Gravity field and steady-state Ocean Circulation Explorer) observations and results will be discussed. Initial POD results show that the GOCE geometrical point-wise positions can be estimated based on high-low SST with an accuracy of 2-3 cm.