@techreport{TUW-109389, author = {Aspelmeyer, Markus and Jennewein, Thomas and Ursin, Rupert and Zeilinger, Anton and Pfennigbauer, Martin and Leeb, Walter}, title = {Quantum Communications in Space (QSpace): Technologies for Quantum Communications in space}, institution = {E389 - Institute of Telecommunications; Vienna University of Technology}, year = {2002} }