The base vector between 2 poins and a high-precision geodetic height difference can be obtained by GPS.If the geodetic height of a point is known,the geodetic height of each observation point in a net can be obtained....The base vector between 2 poins and a high-precision geodetic height difference can be obtained by GPS.If the geodetic height of a point is known,the geodetic height of each observation point in a net can be obtained.When surveying the subsidence value in the mining-induced ground subsidence,the change of the height of monitoring point is needed.On the above theoretical basis,the problem involved in GPS observation of mining-induced ground subsidence and their counter measures were discussed,and an introduction was made that the subsidence value obtained in the monitoring mining-induced ground subsidence can use the change of height of geodetic as a alternative,the result of check on the accuracy and reliability of repetitions observations was analysed.Finally,the effect of errors on accuracy of GPS observation and their reduction measures were elaborated.展开更多
基金FoundatianitemProject(99 mining 20267)supported by Coal Science Fund.
文摘The base vector between 2 poins and a high-precision geodetic height difference can be obtained by GPS.If the geodetic height of a point is known,the geodetic height of each observation point in a net can be obtained.When surveying the subsidence value in the mining-induced ground subsidence,the change of the height of monitoring point is needed.On the above theoretical basis,the problem involved in GPS observation of mining-induced ground subsidence and their counter measures were discussed,and an introduction was made that the subsidence value obtained in the monitoring mining-induced ground subsidence can use the change of height of geodetic as a alternative,the result of check on the accuracy and reliability of repetitions observations was analysed.Finally,the effect of errors on accuracy of GPS observation and their reduction measures were elaborated.
