中国地壳运动观测网络GPS观测方案优化研究  

GPS SCHEME OPTIMIZATION FOR CRUSTAL MOVEMENT OBSERVATION NETWORK OF CHINA

作　　者：王文萍[1] 王庆良[1] 朱桂芝[1] 

机构地区：[1]中国地震局第二地形变监测中心,西安710054

出　　处：《大地测量与地球动力学》2002年第3期60-65,共6页Journal of Geodesy and Geodynamics

基　　金：国家 973项目子课题 (G19980 40 70 3 )资助

摘　　要：中国地壳运动观测网络GPS区域站采用了严格同步环、连续 4天、高站点重复率的观测方案 ,为了优化观测方案 ,以青藏块体东北缘GPS区域网 1999年和 2 0 0 1年观测资料为例 ,对区域GPS观测方案进行了对比试验和分析。结果表明 :①同步环连续 3天和连续 4天观测的基线重复率和站点速度结果基本一致 ,可以采用站点连续 3天观测的方案 ;②异步环有站点重复观测与无站点重复观测对比 ,站点速度差别很小 (亚毫米级 ) ,优化观测时可以大大降低或取消异步环站点重复率 ;③同步环整体解算 (带IGS站 )与环内站点单独解算 (带IGS站 ) ,其站点速率差异可达 1mm以上 。For regional GPS network of Crustal Movement Observation Network of China(CMONOC) project, the observation plan of four days' simultaneous loop and high reoccupation rate of asynchronous sites has been adopted in the campaigns of 1999 and 2001. On the basis of GPS observation results of northeastern Tibetan plateau network, we carried out some quantitative experiments on GPS observation optimization of CMONOC project. The results show that: ①three days' baseline repeatability and site velocity are nearly the same as that of four days', hence, three days' continuous session is precise enough for regional observations; ②with or without reoccupation of asynchronous sites, the difference in velocity is very small(less than 1mm), it means that reoccupation of asynchronous site can be greatly reduced or canceled; ③with or without other simultaneous sites included in GAMIT processing, the velocity difference can reach more than 1mm, so observation plan of simultaneous loop is still advised for future regional GPS monitoring.

关 键 词：中国地壳运动观测网络 GPS观测 全球定位系统 同步环整体解算 

分 类 号：P227[天文地球—大地测量学与测量工程] P228.4[天文地球—测绘科学与技术]