基本释义
n.
大地水准面
相关例句
geoid
1.THE ISOSTATIC RESIDUAL GEOID OVER EURASIA AND THE STRENGTH OF THE UPPER MANTLE
2.The Quasi-geoid Interpolation of GPS Leveling Using DTM and Analysis of Its Effect
3.In the paper, gravity potential model, gravity observation data in the surface of the earth, GPS/leveling and DTM are used to refine qusi-geoid.
4.The global SRTM3 data have been declassified in the beginning of 2005. The vertical datum for SRTM3 is EGM96 geoid, and the horizontal datum for SRTM3 is WGS84. In SRTM3 the nominal absolute altitude accuracy is 16m, and the absolute plane accuracy is 20 m.
5.Comparing the geoid undulations and gravity anomalies derived from the above-mentioned models,the results indicate that the IGGGRACE01S solution is close to EIGEN-GRACE02S solution,and there exist large differences between IGGGRACE01S and EGM96 in Antarctica region.
6.The 3-dimension lithospheric structure is described by common processing and wavelet analysis of Bouguer anomaly, geoid anomaly computation and digital elevation model(DEM) analysis, in combination with deep seismic sounding (DSS) ,magnetotelluric(MT), seismic tomographic(ST) and geological data.
7.Geoid determination in China Sea Area is carried out with the marine deflection of the vertical computed from the altimeter data of Topex/Poseidon, ERS?2 and Geosat/GM ERM, in which 2.5′×2.5′ grids for calculation are used.
8.A couple of DTM in the broad area are established by using the classical method and the GPS technique with the determination of geoid parameters on site,and then the analysis and comparison are undertaken based on the elevation differences of the two DTMs and some conclusions about reliability and precision are drawn.