Study on the methed of GPS leveling using remove-restore technology to approach the geoid;

Experiment research on seeking multinomial curved surface fitting model of GPS leveling;

Application of non-uniform B-spline least square in GPS leveling height fitting;

Least-squares collocation of combing gravity anomalies and GPS/leveling data;

The geoid of Shenzhen with onekilometer resolution, has been constructed with removerestore technique, using 65 GPS/leveling data with accuracy better than 2 cm, 5 213 discrete gravity data, digital terrain model with 100 m resolutions and global earth s gravity field model WDM94.

Geoid heights and gravity anomalies derived from these geo potential models are compared with the 62 GPS/leveling observations and 4871 observed gravity anomalies respectively.

Controlling the mountain area height by GPS level:Taking example of Dingjialin gold mine;

Whether elevation abnormality models are built properly has great effects on the precision of GPS level elevation survey.

5′ high resolution and ±9 cm high precision is for the first time determined by using the gravity data and SRTM3、1:50000 DEM、GTOPO30 topography data based on EGM96、WDM94、IGG05B、DQM2000D and CG03C of the reference gravity field models, as well as 44 GPS levelling control points in the Qomolangma mountain area.

Choice for fitting-model and accuracy estimating in GPS-leveling

Practice of GPS-Leveling in Yellow-River Hydrographic Control Surveying

Analysis on some problems about moving interpolation method in GPS-leveling

The height anomaly processing of GPS/leveling;

Determination of regional quasi-geoid using gravity field models and GPS/leveling data;

The Estimation of the Precision of Fitting GPS/Leveling Elevation Based on Original Quasi-geoid with Polynomial Method;