信号衍射和多路径效应是限制GPS定位精度进一步提高的瓶颈,观测中两者往往同时存在。衍射效应具有不完全重复的特性,为了研究多路径重复性并使其不受信号衍射的影响,本文提出先应用SIGMA-Δ信噪比加权模型削弱信号衍射的影响,再运用改进恒星时滤波法分析多路径重复性。实验观测资料分析表明,SIGMA-Δ模型能有效削弱衍射信号对定位结果影响,并且保留主要的多路径信号;而改进恒星时滤波法能适应测站周围多路径环境的变化,从而最大限度地削减多路径误差。两者组合比传统的恒星时滤波更能有效提高GPS的动态定位精度。Signal diffraction and multipath disturbance are bottleneck problems that limit accuracy of Global Positioning System(GPS) positioning,both of which tend to exist simultaneously.However,the day-to-day repeatability of signal diffraction is not obvious.To take advantage of the day-to-day repeating property of GPS multipath signals and make it not affected by diffraction effects,this paper used the stochastic SIGMA-Δ model to reduce the effects of signal diffraction and then applied the modified s...
Sidereal filtering is an effective method for mitigating multipath error in static GPS positioning. ...
Today real time kinematic GPS (RTK GPS) is the newest and the most common method utilized in tasks r...
This thesis is concerned with the modelling of Global Positioning System (GPS) phase multipath. GPS ...
将交叉证认法与Vondrak数字滤波器相组合,提出一种分离测量资料中信号与噪声的新方法,即CVVF方法,并将该方法用于GPS多路径效应的研究中。对数字模拟试验和实际观测资料的分析表明,该方法能最大限度...
当利用GPS进行高精度变形监测时,GPS信号的多路径效应成为影响GPS变形监测精度和可靠性的一种不可忽略的误差源。本文针对GPS载波相位测量中的多路径效应影响进行理论和试验分析。论述载波相位测量中GP...
In this study, Global Positioning Satellite (GPS) simulation is employed to study the effect of mult...
18th International Technical Meeting of the Satellite Division of The Institute of Navigation, ION G...
Tez (Doktora) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2002Thesis (PhD) -- İstanbul...
The multipath effect is one of the major error sources affecting the Global Positioning System (GPS)...
提出了一种直接通过双频GPS伪距测量数据导出接收站附近垂直TEC的方法,这种方法不需要事先知道卫星和接收机电路时延的精确值,前者可在换算过程中自洽地加以修正,而接收机时钟误差则利用IRI模式的夜晚平均...
Carrier-phase multipath effects are one of the most significant error sources in precise Global Posi...
Yüksek Lisans TeziGNSS gözlem aralıkları, belirli uygulamalar için düşük aralıktan yüksek aralığa (1...
Multipath is a major sidereally-repeating error affecting precise GPS positioning and deformation mo...
NAVSTAR/GPS衛星からの電波を地上の複数点においた受信機で受信し,搬送波の位相を比較することによって地上の観測点の間の相対位置並びに基線長を精度良く求める方法が考案され, GPS干渉測位法と呼...
时空间行为是解读城市空间结构的重要视角.转型期中国城市居民的时空间行为呈现出复杂化、弹性化与个性化等趋势,短期行为与长期行为的关系与作用机理亦成为关键研究问题.本研究基于北京市GPS调查获取的100位...
Sidereal filtering is an effective method for mitigating multipath error in static GPS positioning. ...
Today real time kinematic GPS (RTK GPS) is the newest and the most common method utilized in tasks r...
This thesis is concerned with the modelling of Global Positioning System (GPS) phase multipath. GPS ...
将交叉证认法与Vondrak数字滤波器相组合,提出一种分离测量资料中信号与噪声的新方法,即CVVF方法,并将该方法用于GPS多路径效应的研究中。对数字模拟试验和实际观测资料的分析表明,该方法能最大限度...
当利用GPS进行高精度变形监测时,GPS信号的多路径效应成为影响GPS变形监测精度和可靠性的一种不可忽略的误差源。本文针对GPS载波相位测量中的多路径效应影响进行理论和试验分析。论述载波相位测量中GP...
In this study, Global Positioning Satellite (GPS) simulation is employed to study the effect of mult...
18th International Technical Meeting of the Satellite Division of The Institute of Navigation, ION G...
Tez (Doktora) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2002Thesis (PhD) -- İstanbul...
The multipath effect is one of the major error sources affecting the Global Positioning System (GPS)...
提出了一种直接通过双频GPS伪距测量数据导出接收站附近垂直TEC的方法,这种方法不需要事先知道卫星和接收机电路时延的精确值,前者可在换算过程中自洽地加以修正,而接收机时钟误差则利用IRI模式的夜晚平均...
Carrier-phase multipath effects are one of the most significant error sources in precise Global Posi...
Yüksek Lisans TeziGNSS gözlem aralıkları, belirli uygulamalar için düşük aralıktan yüksek aralığa (1...
Multipath is a major sidereally-repeating error affecting precise GPS positioning and deformation mo...
NAVSTAR/GPS衛星からの電波を地上の複数点においた受信機で受信し,搬送波の位相を比較することによって地上の観測点の間の相対位置並びに基線長を精度良く求める方法が考案され, GPS干渉測位法と呼...
时空间行为是解读城市空间结构的重要视角.转型期中国城市居民的时空间行为呈现出复杂化、弹性化与个性化等趋势,短期行为与长期行为的关系与作用机理亦成为关键研究问题.本研究基于北京市GPS调查获取的100位...
Sidereal filtering is an effective method for mitigating multipath error in static GPS positioning. ...
Today real time kinematic GPS (RTK GPS) is the newest and the most common method utilized in tasks r...
This thesis is concerned with the modelling of Global Positioning System (GPS) phase multipath. GPS ...