顾及海面多路径的PPP自适应选权随机模型PPP adaptive weighted stochastic model considering sea surface multipath
王郁茗,邵利民,张尚悦
摘要(Abstract):
针对适合ZWD估计的Cosine平方PPP随机模型存在仅考虑大气对GNSS观测值的影响,而认为多路径误差对观测信号影响权重一致的问题,该文由舰船横纵摇作用下海面多路径效应的变化规律入手,结合海浪反射面对反射信号影响的研究,对Cosine平方PPP随机模型进行了改进,提出基于舰载GNSS使用的顾及动态海面多路径效应的PPP自适应选权随机模型。实验表明,基于自适应选权随机模型求解的ZWD精度较改进前误差减少30%左右,且海面多路径效应越强,精度提高效果越好。在基于舰载GNSS反演海上水汽含量的应用中,利用该模型可有效减少舰船摇摆情况下海面强多路径效应对ZWD反演精度的影响,保证ZWD满足水汽含量转换的精度要求。
关键词(KeyWords): PPP随机模型;天线姿态;多路径效应;对流层湿延迟;海面粗糙度
基金项目(Foundation): 国防科研基金资助项目(DJYKY2014-103)
作者(Author): 王郁茗,邵利民,张尚悦
DOI: 10.16251/j.cnki.1009-2307.2019.12.006
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