Collaborations have been carried out with groups at:
University of Alabama in Huntsville
Australia National Telescope Facility, CSIRO Division of Radiophysics
Arizona State University
Astronomical Institute ``Anton Pannekoek''
British Geological Survey
California Institute of Technology
University of California, Berkeley
University of California, Santa Barbara
University of California, San Diego
Cambridge University Computer Laboratory
Cambridge University Department of Applied Mathematics and Theoretical Physics
Cambridge University Department of Metallurgy and Materials Science
Cambridge University Engineering Department
Carnegie Institute
University of Capetown
Centre for Astrophysics, Cambridge MA.
Daresbury Rutherford Appleton Laboratory, UK
University of Durham
NFRA Dwingeloo
Goddard Space Flight Center
IAP, Paris
Imperial College, University of London
Instituto de Astrofisica de Canarias
Institute of Astronomy, Cambridge UK
Institute of Theoretical Astrophysik, Heidelberg
Keele University Department of Communication and Neuroscience
Lawrence Livermore National Laboratory
Universite Laval
Leiden University
Marshall Space Flight Center
Massachusetts Institute of Technology, Physics Department.
Max Planck Institut für Extraterristrische Physik, Garching
MRC Laboratory of Molecular Biology, Cambridge
National Radio Astronomy Observatory
Naval Research Laboratory
Northwestern University
Nuffield Radio Astronomy Laboratory (Jodrell Bank)
The Open University
Oxford University
Princeton University, Department of Physics
Queen Mary and Westfield College, University of London
Royal Greenwich Observatory, Cambridge UK
Royal Observatory Edinburgh
St. Mary's University, Halifax, Nova Scotia
St. Patrick's College, Maynooth, Ireland
Space Environment Laboratory, Boulder CO
Space Sciences Lab., University of California, Berkeley
Space Telescope Science Institute, Baltimore
Universities Space Research Association, Huntsville
University of Sydney
University of Toronto
University of Utrecht
Waseda University, Tokyo