北斗系统三频基准站间宽巷模糊度解算方法

Triple-frequency Wide-lane Ambiguity Resolution Method of BDS between the Base Stations

针对北斗系统三频,阐述了宽巷定义法求解网络实时动态差分法宽巷(或超宽巷)模糊度的基本原理,并分析了不同大气延迟和观测值噪声对宽巷模糊度解算的影响。分析表明在大气延迟小于1m时,不同组合中(0,1,-1)组合模糊度对大气误差和观测值噪声综合影响的敏感度最小,单历元模糊度解算成功率几乎为100%;(1,4,-5)和(1,3,-4)组合为次优组合,模糊度求解成功率高于90%。通过一组实测的网络实时动态差分法中长基线解算,表明三频宽巷定义法均能单历元准确求取两个超宽巷模糊度,通过整数组合即可得到任一组合系数为0的宽巷(或超宽巷)模糊度,为网络实时动态差分法基频模糊度解算奠定基础。

Aiming at the triple-frequency of BDS,the principle of wide-lane defined method that solves network RTK（Real-Time Kinematic）wide-lane（or extra-wide-lane）ambiguity was elaborated,and the influences of different atmospheric delay and observation noises for wide-lane ambiguity resolution were analyzed.The analysis shows that when the atmospheric delay is less than 1m,（0,1,-1）combined ambiguity is minimal sensitivity to atmospheric error and observation noises.The success rate of single epoch ambiguity resolution is almost 100%.（1,4,-5）and（1,3,-4）combinations are suboptimal combination.the ambiguity resolution success rates are all higher than 90%.A set of network RTK long baseline solution indicated that the triple-frequency wide-lane defined method can accurately solve two wide lane ambiguities by single epoch.Then any wide-lane（or extra-wide-lane）combined ambiguity whose sum of the coefficients is zero can be gotten through integer combination.This lays the foundation for network RTK basic frequency ambiguity resolution.