北斗中长基线静态测量精度初步评估

摘要

北斗卫星导航系统已于2012年12月27日开始正式提供区域服务,可为亚太地区用户提供定位、导航、授时和短报文通讯等服务,在精密定位方面有很大潜力.本文通过使用南方测绘GNSS后处理软件对长度范围为13~94 km的6条基线的北斗静态测量数据进行处理,并将其解算结果与GPS相应解算结果和已知坐标进行比较,初步评估北斗静态测量精度.试验结果显示,基于广播星历对北斗中长基线(<100 km)静态测量(4 h)数据进行解算的基线精度可达4 cm,因此北斗中长基线静态测量已具有很大的研究价值和应用前景.%BeiDou Navigation Satellite System (BDS)has been officially in operation since Dec 27,2012 and is providing positioning,navigation,timing and short message communication services for the user in the Asia-Pacific region,which also has great potential in the field of precise positioning.In this paper,the accuracy of BDS static survey over medium-long baseline is evaluated by six baselines with range of 13~94 km.The GNSS data post-processing software developed by SOUTH SURVEY is used for BDS and GPS data process.The results show that the accuracy of BDS static survey (4 h)over medium-long baseline (<100 km)has achieved 4 cm experimentally.Consequently,BDS precise survey over medium-long baseline is worth of study and has great potential of practical application.