Institution: | APS Division, Department of Pure and Applied Physics, Queen's University Belfast, Belfast BT7 1NN;Astrophysics Group, School of Chemistry &Physics, Keele University, Staffordshire ST5 5BG;Department of Physics and Astronomy, University of Leicester, University Rd, Leicester LE1 7RH;HM Nautical Almanac Office, Space Science and Technology Department, Rutherford Appleton Laboratory, Chilton, Didcot |