摘要
研究BDS/GPS在鄂北水资源配置工程宝林隧道控制网中的应用,利用宝林隧道二等GNSS控制网2016年4个观测时段数据,分别采用BDS、GPS、BDS+GPS三种模式解算各个时段的基线向量,并以GAMIT的解算值作参考进行成果的精度分析。基线向量结果表明,BDS可以满足宝林隧道的测量精度要求,但在观测条件不佳时,需对观测数据进行筛选,去除噪声较大的历元观测值。对比BDS、GPS单系统基线结果,N与E方向差异可以保持在5mm左右,U方向大部分保持在10mm左右,BDS+GPS观测数据解算精度高于任何一种单系统。不同数据的平差结果精度指标均符合规范。同时对点位进行稳定性分析,不同数据分析结果基本一致。
This paper focuses on the applications of BDS/GPS observations in the Baolin Tunnel Control Network of North Hubei Water Resources Allocation Project.According to the data of four periods in 2016,three models—BDS,GPS and BDS＋GPS are used to calculate the baseline vector of each period respectively.Then we compare the accuracy results with GAMIT solution,which we take as reference value.Results show that the precision result with BDS observation is enough for Baolin Tunnel Control Network.However,observations should be screened to remove the larger ephemeris observations under poor condition.Compared to BDS or GPS solutions（within about 5 mm between North direction and East direction,and 10 mm for Up direction）,the accuracy of BDS＋GPS observations is much higher than each of them.For the incoming error adjustment work,the accuracy results of different adjustment methods are in line with specifications.The stability of points presents approximately same results with different observation data at the same time.
出处
《测绘地理信息》
2017年第2期109-113,共5页
Journal of Geomatics
基金
国家自然科学基金资助项目(41474004)
湖北省水利重点科研基金资助项目(HBSLKY201608)
