University of Kent at Canterbury / Defence and Evaluation Research Agency / National Park Service / Space Standards / United Nations / Unit for Space Science and Astrophysics / International Telecommunications Union / US Space Command / European Space Agency / National Aeronautics and Space Administration / Cassini/Huygens mission / European Space Operations Centre / US Office / Department of Defense / UN Committee on the Peaceful Uses of Outer Space / Council of Europe / Galileo mission / Inter Agency Space Debris Coordination Committee / /