参考站间双差模糊度误判对VRS观测值的影响  

INFLUENCE OF MISJUDGMENT FOR DOUBLE DIFFERENCE AMBIGUITIES BETWEEN REFERENCE STATIONS ON VRS OBSERVATIONS

作　　者：张锋[1] 郝金明[1] 

机构地区：[1]解放军信息工程大学测绘学院,郑州450052

出　　处：《大地测量与地球动力学》2010年第4期151-155,共5页Journal of Geodesy and Geodynamics

摘　　要：虚拟参考站技术融合选定的基准站观测数据,利用VRS内插算法计算出与流动站真实误差较为相近的误差改正数,实现厘米级高精度定位。参考站间模糊度固定误差在生成参考站基线误差改正数时被放大,采用不同的内插算法,参考站间双差误差对VRS观测值的影响不同。通过线性平面内插和二次曲面内插两种方法的比较,得出线性平面内插方法能够削弱参考站间误差对VRS观测值的影响,且受网络构型影响较小,适合于VRS改正数的计算。Virtual reference station technique is usually used to compute approximate corrections to the true errors of rover＇s position through interpolated algorithms,thus it can achieve the positioning accuracy of centimeter-level,but ambiguity errors between reference stations is amplified in creating corrections of baselines between reference stations.The influence of double difference errors on VRS observations is different for using different interpolation algorithms.Through the comparison between a linear plane and higher order surface represented by a quadratic function,the conclusion can be drawn that the linear plane interpolation algorithm is fit for creating VRS corrections.Because it can weaken the influence of errors between reference stations on VRS observations,and the impact of network configuration is on the small side.

关 键 词：虚拟参考站 整周模糊度 距离相关误差 线性平面内插 二次曲面内插 

分 类 号：P228[天文地球—大地测量学与测量工程] P207[天文地球—测绘科学与技术]