摘要
基于应用成熟的网络RTK及城市级高精度的似大地水准面模型,利用3台以上GNSS-RTK仪器同时观测,5 min为一个时段,采样间隔为1 s,记录包含北斗在内的多星同步静态数据,并按预先设计的观测计划与总时段数完成全部观测。使用商用随机软件对后处理数据进行基线解算,各项误差控制在1/3限差内,甄选高精度的基线组网平差,选定大致在网形中且成果可靠的某点为已知点,进行三维无约束平差,得到全部待定点的CGCS2000坐标。成果经检验合格后,使用当地包含精密似大地水准面模型的转换系统转换为地方坐标与正常高程。工程项目试验表明,用此方法获得的正常高有望替代等级水准。
Based on the mature network RTK and city level high-precision quasi geoid model,more than three GNSS-RTK instruments are used to observe for 5 minutes at the same time.The static data recording format with sampling interval of 1 second is used to record the multi satellite synchronous static data including BeiDou,and all observations are completed according to the pre-designed observation plan and the total number of periods.For the post-processing data,the commercial random software is used to solve the baseline,and the errors are controlled within 1/3 of the tolerance as far as possible.The high-precision baseline networking adjustment is selected,and a point with reliable results of multiple stations in the middle of the network is selected as the known point.The three-dimensional unconstrained adjustment is carried out to obtain the CGCs national 2000 coordinates of all the points to be determined,After passing the inspection,the results are converted into local coordinates and normal elevation by using the local conversion system including precise quasi geoid model.Over the years,the application in many engineering projects has proved that the normal high obtained by this method is expected to replace the grade level.
作者
朱旭红
陈骁
刘航羽
黄鹏飞
陈咬根
ZHU Xuhong;CHEN Xiao;LIU Hangyu;HUANG Pengfei;CHEN Yaogen(Yinzhou District Institute of Surveying and Mapping of Ningbo City,Ningbo 315000,China;Ningbo Xinxin Surveying and Mapping Design Research Co.,Ltd.,Ningbo 315000,China)
出处
《测绘通报》
CSCD
北大核心
2022年第S02期54-57,共4页
Bulletin of Surveying and Mapping
作者简介
朱旭红(1977—),男,高级工程师,主要从事GNSS后处理软件研发和数据处理等工作。E-mail:277345141qq.com;通信作者:陈咬根。E-mail:chenyaogen@126.com
