Our many customers in the USA include: 
NASA Goddard Space Flight Centre; 
NASA Jet Propulsion Laboratory; 
California Institute of Technology; 
University of Massachusetts; 
University of Pennsylvania; 
University of Minnesota; 
University of Chicago; 
University of Illinois; 
University of Arizona;
Princeton University; 
University of San Diego;
Cornell University; 
Duke University; 
University of California at Berkeley, and Stanford;  
Argonne National Laboratory, Chicago; 
National Institute of Standards and Technology, Colorado; 
Fermilab, Chicago; 
Photon Spot, Colorado 

Our European customers include: 
The Cavendish Laboratory, Cambridge; 
University of London (Queen Mary & Westfield College, Imperial College), 
University of Sheffield; 
University of Cardiff;  
Glasgow University;
Jodrell Bank (University of Manchester)  
Royal Observatory Edinburgh 
National Physical Laboratory, London
University of Rome, 'La Sapienza' 
Arcetri Observatory, Florence;  
ESTEC, Netherlands 
SRON, Netherlands 
Max Planck Institute, Bonn 
Supracon GmbH, Jena
IDQ Ltd, Geneva
Forschungszentrum J├╝lich

Our customers in the Rest of the World include:
Purple Mountain Observatory, China
National Institute of Metrology, China 
National Taiwan University
National Institute of Astrophysics, Optics and Electronics, Mexico
Lethbridge University, Canada 
McGill University, Canada 
University of Kwa-Zulu Natal, Durban , South Africa
KRISS Institute, South Korea 
Griffiths University, Brisbane, Australia 
Canberra University, Australia
Scontel, Russia
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