PPK动态后处理测量技术及精度分析
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摘要
PPK测量技术属于GNSS动态后处理测量技术,其外业测量时不需要在流动站和基准站之间建立实时的通讯链接,作业半径大,在流动站上进行短时间的观测即可解算出厘米级的精度,介绍了PPK测量作业模式及数据处理过程,对PPK作业的局限性、提高测量精度的方法进行了探讨,并通过实地测试分析了PPK作业过程中测量时间长度、流动站与基准站的距离等因素变化对测量精度的影响,验证了在60 km作业范围内,PPK后处理差分定位精度可达到2 cm～3 cm。
PPK measurement technology belongs to the processing technology of GNSS dynamic measurement.Its measurement does not need to set up a data communication link between base station and mobile station.And its operating radius is bigger,only 2～5 epoch can obtain centimeter level accuracy in the mobile station.This paper introduces the principle of PPK measurement,operation mode and data processing,discusses the limitations of PPK operation and the methods to improve the precision.And through the test analysis the influence of factor change on accuracy,such as the time length of PPK measurement,the length of the mobile station and base station distance and other factors.It was verified that the post-positioning differential accuracy of PPK can reach 2 cm to 3 cm within 60 km of operation.
PPK measurement technology belongs to the processing technology of GNSS dynamic measurement.Its measurement does not need to set up a data communication link between base station and mobile station.And its operating radius is bigger,only 2～5 epoch can obtain centimeter level accuracy in the mobile station.This paper introduces the principle of PPK measurement,operation mode and data processing,discusses the limitations of PPK operation and the methods to improve the precision.And through the test analysis the influence of factor change on accuracy,such as the time length of PPK measurement,the length of the mobile station and base station distance and other factors.It was verified that the post-positioning differential accuracy of PPK can reach 2 cm to 3 cm within 60 km of operation.
引文
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[2]畅毅,房建雪,周敏等.PPK技术作业模式与精度分析[J].全球定位系统,2009,34(1):33~37.
[3]王智,赵亚波.QDCORS在青岛地铁控制网中的应用研究[J].城市勘测,2016(4):106~109.
[4]洪日桂.基于CORS的PPK技术在外业测量中的应用[J].现代测绘,2012,35(5):57~58.
[5]李哲,高立,乔辉.GPS PPK技术在测量外业中的应用探讨[J].测绘与空间地理信息,2012,35(5):120~121.
[6]李振.GPS PPK技术在测量中的应用[J].中国水运,2009,9(1):134~135.
[7]郭建华.GPS PPK技术在地形地籍测量中的应用[J].城市勘测,2010(3):88~90.
[8]董江,王胜平.GPS PPK远距离在航潮位测量及其在航道的实现[J].测绘通报,2008(5):51~53.