Affiliation: | 1School of Physics A28, University of Sydney, Sydney, NSW 2006, Australia; 2Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia; 3BAE Systems Australia, Canberra Deep Space Communication Complex, Tidbinbilla, ACT, Australia; 4Jet Propulsion Laboratory, 169-506, California Institute of Technology, Pasadena, CA 91109, USA |