Institute of Engineering Surveying and Space Geodesy University of Nottingham, University Park, Nottingham, NG7 2RD United Kingdom
Proudman Oceanographic Laboratory, Joseph Proudman Building 6 Brownlow Street, Liverpool, L3 5DA United Kingdom
Norwegian Mapping Authority Geodetic Institute, Kartverksveien 21 Service Box 15, Hoenefoss, N-3504 Norway
Institute of Engineering Surveying and Space Geodesy University of Nottingham, University Park, Nottingham, NG7 2RD United Kingdom
Norwegian Mapping Authority Geodetic Institute, Kartverksveien 21 Service Box 15, Hoenefoss, N-3504 Norway ; Nevada Bureau of Mines and Geology University of Nevada, Mail Stop 178, Reno, Nev 89557 United States