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- 2017
一种基于多频模糊度快速解算方法的BDS/GPS中长基线RTK定位模型
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Abstract:
随着全球卫星导航系统（global navigation satellite system，GNSS）进入多系统时代，空中导航卫星的可见卫星数不断增加，中国北斗卫星导航系统（BeiDou navigation satellite system，BDS）已开始面向用户提供三频导航信号，这都有利于改善单历元实时动态定位（real-time kinematic，RTK）的精度和可靠性。中长基线单历元RTK通常采用电离层无关组合算法，但是该方法将观测噪声进行了放大，模糊度固定成功率随着基线长度的增加而明显降低。提出一种BDS/GPS（global positioning system）中长基线单历元多频RTK定位算法，先以较高成功率快速固定BDS的两个超宽巷模糊度，继而通过简单变换得到BDS宽巷模糊度，然后将其辅助提高GPS宽巷模糊度固定成功率，最后采用将电离层延迟误差参数化的策略以提高BDS/GPS窄巷模糊度固定成功率。结合实测数据进行验证分析，结果表明本文算法是可行的
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