高度角与信号强度联合对精密单点定位的影响  

The impact of altitude angle and signal strength combined model on precise point positioning

作　　者：任超[1] 黄惠[2] 杨兴跃[2] 

机构地区：[1]桂林理工大学,广西桂林541004 [2]桂林理工大学广西空间信息与测绘重点实验室,广西桂林541004

出　　处：《测绘科学》2016年第4期24-27,共4页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41461089);广西空间信息与测绘重点实验室资助课题项目(130511407)

摘　　要：针对目前对于随机模型联合定权方面没有太多研究的现状,该文以全球定位系统/格洛纳斯卫星导航系统的实测数据为例进行了实验分析。对比分析了等方差随机模型、基于高度角的随机模型和基于信噪比的信号强度随机模型,并由此提出高度角与基于信噪比的信号强度相联合的随机模型。结果表明:该模型与等方差随机模型相比,提高了精密单点定位的精度,同时也优于基于高度角和基于信噪比的信号强度随机模型。Stochastic models have important influence on GPS/GLONASS combination of precise point positioning （PPP）. This paper analyzed the random variance model, stochastic model based on altitude an- gle and stochastic models based on the SNR of signal strength, and then put forward altitude angle and combined stochastic model based on the SNR of signal strength by carrying on the experimental analysis with the data of GPS/GLONASS. Results showed that the combined model significantly improved the pre- cise point positioning accuracy comparing to the random variance model, which was better than the sto- chastic models that based on the altitude angle and based on the SNR of signal strength as well.

关 键 词：随机模型 精密单点定位 等方差 高度角 信号强度 

分 类 号：P208[天文地球—地图制图学与地理信息工程]