Terrestrial data analysis and SINEX generation

This position paper focuses on the computation of local ties between co-located space geodetic instruments using terrestrial data, and on SINEX generation. We address also some important aspects related to the Reference Point (RP) definition for the various instrument types, i.e. VLBI, SLR, GPS and DORIS. The main issue is related to the data analysis of the terrestrial data, and to the generation of the final SINEX files, which should contain the full variance covariance matrix for the local ties. Finally, we provide recommendations regarding local tie determination and the documentation of the results.