摘要
GNSS移动基站技术应用于水运工程中,接收机实时进行星站差分定位并作为RTK基站向外广播RTK差分数据,通过试验评估RTK流动站的定位性能。选取长江口典型水运工程区,制定实时动态定位试验方案,参考同步PPK定位结果,分析实时动态定位模式下RTK流动站的定位精度及影响因素,评估实时动态定位模式下零基线稳定性。试验表明,RTK流动站的N、E方向可在3 min内实现收敛,收敛后20 min内偏差RMS不超过1.0 cm;H方向可在4 min内实现收敛,收敛后20 min内偏差RMS不超过3.0 cm。移动基站与RTK流动站相对距离过大、相对高差突然降低等情况易出现RTK流动站定位不佳现象。2个流动站零基线定位的N、E方向差值保持在毫米级,H方向差值不超过±1.5 cm,定位定向稳定性高。
The GNSS receiver performs real-time satellite differential positioning and broadcasts RTK differential data as an RTK base station when GNSS mobile base station technology is applied in port and waterway engineering,by conducting a series of tests to evaluate the RTK positioning performance of the rover station.A test scheme about real-time dynamic positioning was developed by selecting a typical port and waterway engineering area located at the Yangtze River estuary.Referring to the synchronous PPK positioning results,the accuracy and influencing factors of RTK rover station and the stability of zero baseline in real-time dynamic positioning mode were analyzed.The experimental shows that the N and E directions of the RTK rover station can converge within 3 min,and the deviation RMS is less than 1.0 cm within 20 min after convergence;The H direction can converge within 4 min,and the deviation RMS is less than 3.0 cm within 20 min after convergence.When the relative distance between the mobile base station and the RTK rover station is too large or the relative height difference is suddenly reduced,the RTK rover station is prone to poor positioning.The difference in N or E directions of the zero baseline positioning of two rover stations kept at millimeter level and the difference in H direction is less than ±1.5 cm,indicating high stability in positioning and orientation.
作者
汪波
吴彬
WANG Bo;WU bin(Shanghai Dahua Surveying&Mapping Technology Co.,Ltd.,Shanghai 201208,China)
出处
《中国港湾建设》
2023年第12期6-11,20,共7页
China Harbour Engineering
关键词
星站差分定位
移动基站
动态定位
零基线
satellite differential positioning
mobile base station
dynamic positioning
zero baseline
