Abstract:In this paper, SLR observations are used to validate the CODE final orbit of GLONASS satellites. The CODE final orbits of GLONASS are evaluated using the SLR data from January 1, 2015 to December 31, 2015 of EDC. The validation is statistically analyzed according to different satellite PRN and SLR sites. The results show that validations are uneven, which is related to the service life of the satellite. The new satellites have better validation results than satellites of the first track orbit by GLONASS. The site-satellite distance measured with SLR is shorter than that from final orbit and site coordinates. There remain small systematic errors, and the cause of these biases is not yet fully clear. The validations show that SLR observation accuracy is about 1.2 cm for GLONASS satellites. The accuracy of GLONASS satellite orbit validated by SLR date is mostly better than 3.3 cm.