Initial Estimations of the Lunar Lander Positionby OCEL Observations Zhang, Z. ; Han, S. ; Nothnagel, A. ; La Porta, L. ; Halsig, S. ; Iddink, A. ; Jaron, F. ; Haas, R. ; Lovell, J. ; Neidhardt, A. ; Plötz, C. ; Tang, G. Abstract Publication: 23rd European VLBI Group for Geodesy and Astrometry Working Meeting Pub Date: November 2017 Bibcode: 2017evga.conf..200Z