Use GPS receiver in hydrogeologic investigation of gold mining area
LI Shi-qiao,WU De-shi,SHEN Rui-wen (No.12 Gold Geological Party of CAPF, Chengdu 610036,Sichuan, China)
To improve the point orientation precision of GPS receiver in hydrogeologic investigation of gold mining area, 6 known survey control points are selected to parameter test, over 4 satallite signals should be hunted out at every control point and the orientation time is not less 5 min. Contract the coordinate between different known survey points in mining area and the survey points by GPS receiver after establish the projection mode and scale parameter. The reliability and precision of the survey result depend on the receiver, software and the graphic intensity and observe circumstance of the satellite. After parameter correction, the point orientation precision of GPS receiver is within ±5 m and could satisfied the engineering drop precision require of 1∶10 000 or smaller scale hydrogeologic investigation.
【CateGory Index】： P228.4