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钱妮佳, 王海, 李方超*, 高井祥. (2019). 顾及卫星空间分布的GNSS信噪比随机模型
- Release time:2019-12-01
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Journal:
测绘科学Key Words:
随机模型;等权模型;高度角模型;信噪比模型;位置精度因子Abstract:
为了研究随机模型对GNSS定位精度的影响,介绍了GPS/GLONASS/BDS组合伪距单点定位的函数模型以及几种当前常用的先验随机模型。结合各个模型的优缺点,提出通过指数函数引入空间分布改善因子,建立一种改进的信噪比随机模型,并设计相关多系统伪距单点定位试验对其性能进行分析。实验结果表明:改进模型的解算精度显著优于现存的几种先验随机模型,相比等权模型在三维定位精度上提升15%~30%,相比高度角模型提升15%~25%,相比信噪比模型提升5%~15%,相比现存的PDOP模型也有明显提升。改进模型在不同遮蔽情况、双系统和三系统组合定位时精度均优于现存的信噪比随机模型,从而验证了该定权算法的有效性。Indexed by:
Journal paperDiscipline:
EngineeringFirst-Level Discipline:
Surveying and MappingDocument Type:
JVolume:
44Issue:
12Page Number:
21-28+49Translation or Not:
noDate of Publication:
2019-12-01Links to published journals:
https://doi.org/10.16251/j.cnki.1009-2307.2019.12.004
- Pre One:Guobin Chang*, Nijia Qian, Chao Chen, Jingxiang Gao. (2020). Precise instantaneous velocimetry and accelerometry with a stand-alone GNSS receiver based on sparse kernel learning
- Next One:Nijia Qian, Guobin Chang*, Jingxiang Gao. (2020). GNSS pseudo-range and time-differenced carrier phase measurements least-squares fusion algorithm and steady performance theoretical analysis