• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 21 Issue 6
Dec.  2008
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Article Contents
LIU Chenglong, YANG Youtao, XU Xiaozuo. Simulated Determination of Accuracy Requirement for Control Points Ⅲ Intersection Networks in High-Speed Railway[J]. Journal of Southwest Jiaotong University, 2008, 21(6): 718-723.
Citation: LIU Chenglong, YANG Youtao, XU Xiaozuo. Simulated Determination of Accuracy Requirement for Control Points Ⅲ Intersection Networks in High-Speed Railway[J]. Journal of Southwest Jiaotong University, 2008, 21(6): 718-723.

Simulated Determination of Accuracy Requirement for Control Points Ⅲ Intersection Networks in High-Speed Railway

  • Received Date: 23 May 2008
  • Publish Date: 25 Dec 2008
  • To meet the accuracy requirement of relative positioning,it is necessary to perform the further investigation on the form of CPⅢ(control points Ⅲ) control networks and the precision evaluation of observations from field surveying.By combining the standard with the improved forms of CPⅢ control networks,a rigorous method for accuracy estimation based on the parameter adjustment of side-angle measurement network was proposed.A simulated test was performed to investigate the relative accuracy between points,and the necessary precision assessment for field observations was further discussed.The research result shows that the azimuth measurement accuracy of less than ±1″ and the distance measurement accuracy of less than ±(1+1×10-6) mm in a high-speed railway system are respectively required.The research provides a reference for the revision of the present measurement specification for high-speed roadway and the selection of surveying methods for ballastless track.

     

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