6[9]Tapley B.Statistical Orbital Determination [ J ].JGeophy Res,1983,(B11):235-242.
7[10]FisherM.The Thoery of Probability and Statistics[ M ].Shanghai:Shanghai Science and Technolog Publishing house,1978.
8FEATHERSTONE, W. E. , DENTITH, M. C. and KIRBY, J.F. (1998) Strategies or the accurate determination of orthometric heigths from GPS[J]. Survey Review, New York, v. 34.
