基于最小二乘与均值滤波的GNSS伪距单点定位精度分析
Journal: Geological and Mineral Surveying and Mapping DOI: 10.32629/gmsm.v9i1.2414
Abstract
全球导航卫星系统(GNSS)伪距单点定位技术因其操作简便、成本低廉和全球覆盖的特性,在导航与位置服务领域具有重要地位。本文系统阐述了GNSS伪距单点定位的基本原理,重点研究了基于最小二乘估计算法的定位解算模型,并详细分析了主要误差源及其改正方法。开发了一套伪距单点定位程序,处理了来自全球不同地区IGS基站的观测数据。实验结果表明,基于最小二乘的伪距单点定位精度可达10米级别,且定位精度受测站地理位置与时间变化的影响显著。为进一步提升定位结果的实用性,本文引入均值滤波算法对定位结果进行后处理平滑。结果表明,该滤波方法能有效抑制定位序列的高频噪声,提升定位结果的稳定性和平滑度,为改善伪距单点定位性能提供了一种有效的后处理思路。
Keywords
GNSS；伪距单点定位；最小二乘估计；精度分析；均值滤波
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