摘要
CPⅢ平面网精度要求高、外业观测的数据量大。如何评定CPⅢ平面网外业观测数据的精度,以及如何进行CPⅢ平面网外业观测数据的粗差探测,是CPⅢ网理论研究和测量实践的重要内容之一。本文在充分研究CPⅢ平面网网形特点的基础上,提出CPⅢ网纵横向闭合差的概念,并推导CPⅢ网纵横向闭合差限差的计算模型。通过模拟计算,确定了CPⅢ网纵横向闭合差极限误差的建议值,并据此进行CPⅢ网外业观测数据中是否含有粗差的检核。剔除并重测含有粗差的外业观测数据,可以有效提高CPⅢ网的可靠性和精度。本文的研究成果,对CPⅢ平面网测量及相关测量规范的制定和完善有参考价值。
The CPⅢ plane network has the characteristics of high precision as well as large amounts of field observation data. So how to evaluate the precision and detect the gross error of field observation data for the CPⅢ plane network is one of the important contents in theoretical study and practice of measurement for the CP Ⅲ plane network. On the basis of being acquainted with the characteristics of the CPⅢ plane net form, the paper presents the concept of the longitudinal and lateral closure for the CPⅢ network and derivation of the calculation model for the tolerance of the CPⅢ longitudinal and lateral closure. The paper also discusses how to properly determine the tolerance of the longitudinal and lateral closure for the CPⅢ network by analog calculation to realize effective inspection in detecting the gross errors of field measurement in the CPⅢ network with the method of closure, then eliminates and resurveys field measurement with gross errors to improve the precision and strengthen reliability of the CPⅢ network. The research provides a reference for formulation and revision of the specifications for the CPⅢ plane network and related measurement.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2009年第5期79-83,共5页
Journal of the China Railway Society
基金
铁道部科技研究开发计划(2008G031-16)
关键词
CPⅢ平面网
纵横向闭合差
限差
粗差探测
CPⅢ plane network
longitudinal and lateral closure
tolerance
gross error detection
