KeyLaboratoryofDynamicalGeodesy;
InstituteofGeodesyandGeophysics;
ChineseAcademyofSciences;
Wuhan;
430077;
P.R.China//GraduatedSchool;
ChineseAcademyofSciences;
Beijing;
100039;
P.R.China;
KeyLaboratoryofDynamicalGeodesy;
InstituteofGeodesyandGeophysics;
ChineseAcademyofSciences;
Wuhan;
430077;
P.R.China;
CivilEngineeringDepartment;
GuilinUniversityofTechnology;
Guilin;
541004;
P.R.China;