CGCS2000框架下区域CORS站数据联合处理  

Research on Joint Data Processing Method Using Regional CORS in CGCS 2000

作　　者：刘鸿飞[1,2] 姜卫平[3] 汪燕麟 陈华[2] 伍岳[4] 

机构地区：[1]云南省测绘工程院,云南昆明650033 [2]武汉大学测绘学院,湖北武汉430079 [3]武汉大学卫星导航定位技术研究中心,湖北武汉430079 [4]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《武汉大学学报（信息科学版）》2014年第2期161-165,共5页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2012AA12A209);武汉大学地球空间环境与大地测量教育部重点实验室开放研究基金资助项目(1202012);国家自然科学基金资助项目(41004010)~~

摘　　要：目前CGCS2000框架下区域CORS站联测数据处理中,由于已知点(GPS A、B级点)精度空间分布不均匀,且存在地壳运动的影响,导致了区域CORS联测网平差中先验信息存在的不确定性,影响了CGCS2000基准由A、B级点至CORS站的传递。研究了基于坐标模式的卡尔曼滤波模型中引入大地基准的约束方法,设计3种引入基准的策略,并利用我国某省级CORS联测数据比较分析了不同策略的优劣,提出了保证网形畸变最小且兼顾已知点坐标衔接的基准引入策略。Two limitations exist in joint data processing for regional CORS campaign in CGCS2000 at present： （1） the coordinate accuracy of known CGCS2000 points （national A/B level points） and uneven distribution; （2） A/B level coordinates change due to crustal movement was not considered. Those two problems induce t uncertainty in the priori coordinates of known points, and may affect datum transmission to CORS. Aiming at solving these problems, two different approaches were investigated on methods to impose constraints and specify a uniform reference frame to be implemented after all of the observations have been combined with loose constraints based on the Kalman filter model. Three datum introduction strategies were designed and tested to analyze the advantages and disadvan- tages of different methods using provincial CORS campaign data. A strategy for minimized network distortion was proposed, to ensure the consistency between adjustment results and the correspondent a prior values for the known points（A/B level points）.

关 键 词：CORS CGCS2000 约束 卡尔曼滤波 参考框架中图法 

分 类 号：P228.41[天文地球—大地测量学与测量工程]