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In this paper we wish to preliminary investigate if it would be possible touse the orbital data from the proposed OPTIS mission together with those fromthe existing geodetic passive SLR LAGEOS and LAGEOS II satellites in order toperform precise measurements of some general relativisticgravitoelectromagnetic effects, with particular emphasis on the Lense-Thirringeffect.Comment: Abridged version. 16 pages, no figures, 1 table. First results from  the GGM01C Earth gravity model. GRACE data include

On the possibility of measuring the Lense–Thirring effect with a LAGEOS–LAGEOS II–OPTIS mission