Published online by Cambridge University Press: 03 August 2017
A new realization of the BIH Terrestrial System, using space information (VLBI, LLR, SLR, Doppler), was published in the BIH Annual Report for 1984, under the name BTS 84. Details about the analysis, as well as comparisons between BTS 84 and BTS 85, and between BTS 85 and other individual systems, are presented. A study of origin, scale and orientation characteristics of BTS with regard to other systems is given. Further improvements of the model, taking time-like variations into account, are also outlined.