利用改进的Stokes-Helmert边值理论解算高精度似大地水准面

发布时间：2018-05-20 05:19

本文选题：似大地水准面精化 + Stokes-Helmert法　；参考：《测绘通报》2017年08期

【摘要】：利用改进的Stokes-Helmert边值问题实现了临沂市厘米级似大地水准面精化。首先,基于Stokes理论和Molodensky理论,联合精密确定地表及其外部扰动引力位的严密解算理论,给出Stokes-Helmert边值问题的数学描述,以及直接地形影响和间接地形影响的严密理论表达式;然后,利用多源观测资料,根据"移去-恢复"技术构建临沂高精度的重力似大地水准面模型;最后,利用GPS/水准高程异常对重力似大地水准面模型进行控制拟合,求得最终的大地水准面模型,其外符合精度达到1.6 cm。
[Abstract]:The improved Stokes-Helmert boundary value problem is used to refine the centimeter quasi geoid in Linyi City. Firstly, based on Stokes theory and Molodensky theory, the rigorous calculation theory of precise determination of the gravitational potential of the surface and its external disturbance is presented, and the mathematical description of the Stokes-Helmert boundary value problem is given, as well as the rigorous theoretical expressions of direct and indirect topographic effects. Then, the gravity quasi geoid model with high precision in Linyi is constructed by using the multi-source observation data, and the gravity quasi geoid model is controlled by using the GPS/ leveling anomaly. The final geoid model is obtained, and its external coincidence accuracy reaches 1.6 cm.
【作者单位】：临沂市国土资源局测绘院;
【分类号】：P223.0

【相似文献】