Abstract:In this paper we present the method of satellite orbit validation with SLR measurements, and use SLR data observed from 1 November 2009 until 31 January 2010 (3 months) to validate the GOCE PKI (precise kinematic) orbit. Based on residual analysis, we find that system error due to station time bias and range bias exits and has not been removed in the SLR observation. After modeling and fitting the station time bias and range bias, we achieve the GOCE PKI orbit precision at the level of 1.5 cm.