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中国地壳运动观测网络基本网观测精度研究
引用本文:王琪,牛之俊,石俊成. 中国地壳运动观测网络基本网观测精度研究[J]. 大地测量与地球动力学, 2003, 23(3): 9-13
作者姓名:王琪  牛之俊  石俊成
作者单位:1. 中国地震局地震研究所,武汉,430071
2. 中国地震局中国地壳运动观测网络工程中心,北京,100036
3. 中航勘察设研究院,北京,100085
基金项目:国家重大科学工程“中国地壳运动观测网络”项目,国家自然科学基金 (4 0 2 740 0 7)
摘    要:“中国地壳运动观测网络”于1998~2002年开展过5次基本网GPS联测。利用GIPSY软件处理结果进行的统计分析表明:基线定位水平分量精度为2~5mm,垂直分量为7~15mm;基线变化的水平分量测定精度为0.5mm/a,达到了流动观测的最高水平。分析基线定位误差发现:固定误差是目前相对定位的主要误差;与基线长度有关的比例误差对于水平分量而言,基本可以忽略。对速率的统计分析说明:至少4年观测间隔,才有可能获得比较精确、可靠的测站速率结果。

关 键 词:中国地壳运动观测网络 精度 GPS GIPSY软件 基线定位误差
文章编号:1671-5942(2003)03-0009-05

OBSERVATION PRECISION OF BASIC NETWORK OF CMONOC
Wang Qi,Niu Zhijun and Shi Juncheng {)} )Institute of Seismology,CSB,Wuhan )Research Center of CMONOC,CSB,Beijing )Institute of Geotechnical Engineering,AVIC,Beijing. OBSERVATION PRECISION OF BASIC NETWORK OF CMONOC[J]. Journal of Geodesy and Geodynamics, 2003, 23(3): 9-13
Authors:Wang Qi  Niu Zhijun   Shi Juncheng {)} )Institute of Seismology  CSB  Wuhan )Research Center of CMONOC  CSB  Beijing )Institute of Geotechnical Engineering  AVIC  Beijing
Affiliation:Wang Qi,Niu Zhijun and Shi Juncheng {3)} 1)Institute of Seismology,CSB,Wuhan 430071 2)Research Center of CMONOC,CSB,Beijing 100036 3)Institute of Geotechnical Engineering,AVIC,Beijing 100086
Abstract:Five-epoch GPS campaigns for basic network of CMONOC were carried out in 1998 through 2002. On the basis of data output processed by GIPSY-software, short-term precision of baseline determination is estimated at 2-5 mm for horizontal component and 7-15 mm for the vertical. The long-term precision is similar to the short-term one in magnitude,this suggests that the highest achievable precision can be obtained from these observations. The baseline uncertainty is attributed to site-dependent errors associated with multi-path signal, un-calibrated propagation delays, unstable marker etc.The length-dependent error associated with orbit determination biases is minor if any , can be ignored for the horizontal.We have drawn the conclution that at least four-year interval is required to precisely determine site displacement rate.
Keywords:CMONOC  GPS  precision.
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