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现代地质 ›› 2007, Vol. 21 ›› Issue (Suppl): 148-151.

• 地球探测与空间信息技术 • 上一篇    下一篇

利用GPS/水准数据确定区域似大地水准面

宋雷1,2,黄腾1,方剑2   

  1. 1河海大学 土木工程学院,江苏 南京210098; 2中国科学院 测量与地球物理研究所动力大地测量学重点实验室,湖北 武汉430077
  • 收稿日期:2006-08-19 修回日期:2006-11-29 出版日期:2007-08-20 发布日期:2007-08-20
  • 作者简介:宋雷,男,博士研究生,1970年出生,大地测量学与测量工程专业,主要从事物理大地测量与大地水准面精化研究。
  • 基金资助:

    国家自然科学基金项目(40574033)

Determination of Region Quasi-geoid Using GPS/Levelling Data

SONG Lei1,2 , HUANG Teng1 ,  FANG Jian2   

  1. 1College of Civil Engineering, Hohai University,Nanjing,Jiangsu210098, China;
    2Key Laboratory of Dynamical Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, Hubei430077, China
  • Received:2006-08-19 Revised:2006-11-29 Online:2007-08-20 Published:2007-08-20

摘要:

为了有效地利用GPS观测的高程信息,实现GPS观测值中的椭球高向正常高转化。利用某区域C级GPS控制网和该网的三等水准观测数据,应用几何方法确定了该区域1.5′×1.5′分辨率的似大地水准面模型,将模型似大地水准面高程异常与区域内的C级GPS/水准点和D级GPS/水准点实测高程异常进行比较,内符合精度和外符合精度均优于30 cm,表明似大地水准面模型精度达到厘米级。

关键词: GPS/水准, 高程异常, 似大地水准面

Abstract:

In order to use the height information of GPS observation and to translate ellipsoid height into normal height of observation point, the 1.5′×1.5′ distinguish rate region quasi-geoid has been constructed with geometry method,using C grade GPS control-web and Levelling data. The modeled quasi-geoid height anomaly was compared with C grade GPS/Levelling and D grade GPS/Level in  height anomaly. The accuracy of  inner and outer were all excelled than 30 cm. This shows that the accuracy of region quasi-geoid is centimeter grade.

Key words: GPS/Levelling, height anomaly, Quasi-geoid

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