基于CORS的GNSS数据质量分析方法改进研究

伴随着国家2000大地坐标系的全面推广和应用以及卫星导航定位技术的飞速发展,全国各地陆续建立起了基于ITRF框架下CGCS2000坐标系的CORS系统,兼容北斗、GPS、GOLNASS等多星座系统。基于CORS的多星座GNSS数据质量分析的重要性便更加凸显出来。本文重点研究了目前常用的GNSS数据质量分析方法,提出基于小波变换的数据预处理思想,并通过数据质量分析评价这一思想的实际效果,最终结果表明:利用小波变换进行数据预处理有助于提升数据质量。

Research on Improvement of GNSS Data Quality Analysis Method Based on CORS

With the continuous maturity of GNSS/InSAR technology,its application fields are becoming wider and wider,and the suc-cessful application cases of multi-source data fusion are also increasing.This paper focuses on the application of InSAR data in moni-toring surface subsidence caused by groundwater loss in cities,and the suitable conditions,calculation methods and interpolation effects of the weighted average method,trigonometric linear interpolation method,moving surface fitting method and polyhedral func-tion method interpolation methods are studied.Based on the statistical analysis of the experimental results,the conclusion of this paper is drawn:in the urban environment,it is recommended to use the interpolation method of moving surface fitting,which has high inter-polation accuracy and is not easy to fail.