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  • 标题:Feasibility study of high-precision trigonometric elevation replacing second-order level in tunnel penetration control survey
  • 本地全文:下载
  • 作者:Zhang Hongfeng
  • 期刊名称:E3S Web of Conferences
  • 印刷版ISSN:2267-1242
  • 电子版ISSN:2267-1242
  • 出版年度:2020
  • 卷号:165
  • 页码:1-4
  • DOI:10.1051/e3sconf/202016504022
  • 出版社:EDP Sciences
  • 摘要:Based on the principle of trigonometric elevation measurement and the law of error propagation, the trigonometric elevation formula is derived in this paper. The factors that cause the trigonometric measurement error are analyzed accurately. It is considered that the use of a high-precision total station for the trigonometric elevation measurement under opposite conditions can reach the second-order level measurement accuracy.
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