GPS单双频混合方法在地表形变监测中的应用

发布时间：2018-06-23 20:58

本文选题：单双频混合 + GPS　；参考：《武汉大学学报(信息科学版)》2016年05期

【摘要】：在地表形变监测中,若全采用双频GPS则费用过高,若全采用单频GPS则因电离层误差得不到较好消除而导致精度下降。针对这一问题,本文采用GPS单双频混合模式,即通过解算监测区域外围的双频GPS数据获取该区域大气延迟误差残余量,将其用于改正内部单频监测站点数据,从而在降低硬件成本的同时改善监测精度。利用研发的软件对实测数据进行处理分析,结果表明,改正后的高程分量精度优于1.24cm,三维位置精度优于1.59cm,较单频方法提高24%;且当单频站点位于双频站点组成的区域内部时改正效果更好,高程分量精度优于0.95cm,三维位置精度优于1.2cm,精度改善比例达到30%,最高可达58%。
[Abstract]:In the monitoring of surface deformation, it is too expensive to adopt dual-frequency GPS, and if all single-frequency GPS is used, the accuracy will be decreased because the ionospheric error can not be eliminated well. In order to solve this problem, the GPS single and double frequency mixed mode is adopted in this paper, that is, the residual atmospheric delay error in the monitoring area is obtained by solving the dual frequency GPS data around the monitoring area, and it is used to correct the internal single frequency monitoring station data. In order to reduce the cost of hardware at the same time improve the monitoring accuracy. Using the developed software to process and analyze the measured data, the results show that, The accuracy of the corrected elevation component is better than 1.24 cm, the 3-D position accuracy is better than 1.59 cm, which is better than that of single frequency method, and the correction effect is better when the single frequency station is located within the region composed of double frequency stations. The accuracy of elevation component is better than 0.95cm, the accuracy of 3D position is better than 1.2cm, the precision improvement ratio is 30cm, and the highest is 58cm.
【作者单位】：中南大学地球科学与信息物理学院;湖南省精密工程测量与形变灾害监测重点实验室;
【基金】：湖南省高校创新平台开放基金(14K102)~~
【分类号】：P228.4;TU196.1

【相似文献】