4Dennis D, McCarthy and Gerard Petit(eds.). IERS Conventions[R]. IERS Technical Note 32, Verlag des Bundesamts fur Kartographie und Geodasie, Frankfurt am Main,2004.
5Moritz H. Geodetic reference system 1980 [J]. Journal of Geodesy, 2000,74: 128 - 133.
6NIMA. World geodetic system 1984, its definition and relationships with local geodetic systems [R], National Imagery and Mapping Agency technical Report, NIMA TR8350.2,Third Edition Amendment 1, 3 January,2000.
7Heiskanen W H and H Moritz. Physical geodesy[M] W.H. Freeman and Company, San Francisco, California and London, UK, 1967.
