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四大GNSS导航卫星系统发播三频及以上观测数据成为必然趋势。本文基于IGS钟差基准研究了三频非组合（UC）精密定轨模型及其模糊度固定方法。将载波相位硬件延迟分成时变和时不变参数，并进行参数重组，得到三频非组合定轨观测模型；类似精密定位中的超宽巷、宽巷、窄巷的分步模糊度固定策略，使用双差法推导了三频非组合模糊度固定方法。以发射三频信号的GPS ⅡF、BDS-2、Galileo卫星为例，进行1/2频点...
在精细考虑伪距和载波相位硬件偏差时变特性的基础上，导出了更为严谨的非差非组合观测方程，并给出了非组合模式下两类GNSS偏差的数学表达形式。基于此，本文详细研究了3种常用的三频精密单点定位（PPP），即无电离层两两组合IF1213、单个无电离层组合IF123与非组合UC123函数模型的独立参数化方法，系统分析了3种PPP模型的相互关系以及GPS/BDS/Galileo三频静、动态PPP定位性能。结果...
2020年12月14日，中国科学院国家授时中心系统时间性能监测评估组监测到伽利略卫星导航系统（以下简称Galileo系统）时间发生异常，异常持续时间3小时左右。该小组监测发现，Galileo系统时间从UTC时间2020年12月14日0 时起（北京时间上午8点），部分卫星播发的时间信息存在无规律的跳变，导致监测到的系统时间出现异常。以UTC(NTSC)为参考，获得的Galileo系统时间（GST）相...
SENSORS FOR LOCATION-BASED AUGMENTED REALITY THE EXAMPLE OF GALILEO AND EGNOS
Augmented Reality Sensors Galileo Photogrammetry
2016/7/5
Augmented Reality has long been approached from the point of view of Computer Vision and Image Analysis only. However, much more sensors can be used, in particular for location-based Augmented Reality...
LBS AUGMENTED REALITY ASSISTIVE SYSTEM FOR UTILITIES INFRASTRUCTURE MANAGEMENT THROUGH GALILEO AND EGNOS
LBS 3D GIS augmented reality utilities Galileo photogrammetry pose estimation
2016/7/5
There is a continuous and increasing demand for solutions, both software and hardware-based, that are able to productively handle underground utilities geospatial data. Innovative approaches that are ...
Code Generation Scheme and Property Analysis of Broadcast Galileo L1 and E6 Signals
Code Generation Scheme Broadcast Galileo L1 E6 Signals
2015/6/25
In this paper, we decode the PRN codes of the L1 and E6 signals broadcast by the Galileo GIOVE-A test satellite.We apply the 45.7 m Stanford SRI Dish and the 1.8m dish of the Stanford GNSS Monitor Sys...
Further Development of Galileo-GPS RAIM for Vertical Guidance
Further Development Galileo-GPS RAIM Vertical Guidance
2015/6/25
With the much anticipated deployment of Galileo, a new partner will rise on the sky of Global Navigation Satellite Systems (GNSS). Equally anticipated is the launch of the modernized block III GPS sat...
In the next ten years the number of pseudorange sources and their quality is expected to increase dramatically:The United States is going to add two new civil frequencies (L5 and L2C) in the modernize...
Galileo GIOVE-A Broadcast E5 Codes and their Application to Acquisition and Tracking
Galileo GIOVE-A Broadcast E5 Codes Application Acquisition Tracking
2015/6/25
In this paper, we decode the PRN codes of the E5a and E5b signals broadcast by the Galileo GIOVE-A test satellite. The Galileo E5 band overlaps with Distance Measuring Equipment (DME) and Tactical Air...
Multiple Hypothesis RAIM with Real-Time FDE and Forecasted Availability for Combined Galileo-GPS Vertical Guidance
Multiple Hypothesis RAIM Real-Time FDE Forecasted Availability Galileo-GPS Vertical Guidance
2015/6/25
The number of ranging sources for the aviation user is expected to increase with the Galileo system becoming fully operational over the next decade, and the projected launch of a modernized GPS III co...
Fault Detection and Elimination for Galileo-GPS Vertical Guidance
Fault Detection Elimination Galileo-GPS Vertical Guidance
2015/6/25
In anticipation of the future launches of dual-frequency GNSS satellites, such as Galileo and GPS block III, a series of new developments has taken place in the field of Receiver Autonomous Integrity ...
Direct Comparison of the Multipath Performance of L1 BOC and C/A using On-Air Galileo and QZSS Transmissions
multipath BOC MBOC
2015/6/24
New Global Navigation Satellite System (GNSS) satellites will bring common, interoperable GNSS signals on L1.These new signals, L1C Global Positioning System (GPS)/Quasi-Zenith Satellite System (QZSS)...
Enhanced model for precise point positioning with single and dual frequency GPS/Galileo observables
GNSS PPP GPS Galileo Single frequency Dual frequency
2014/11/28
This paper introduces a newly developed model for both single and dual-frequency precise point positioning (PPP), which combines GPS and Galileo observables. As is well known, a drawback of a single G...
Galileo卫星导航系统单频模拟软件信号源的设计
Galileo卫星导航系统 中频模拟信号源 软件平台
2013/8/16
Galileo模拟信号源既可以为Galileo接收机的设计与测试提供良好的仿真环境，同时也可为Galileo系统新技术新方案的验证提供平台。本文针对Galileo E1频段信号提出了一种基于C++软件平台的中频模拟信号源设计框架。文章在给出中频信号数学模型及模拟软源的设计原理框图的基础上，进一步将设计按功能分为5部分，分别为伪随机码产生，导航电文生成，信号MBOC调制，环境和误差模拟以及信号量化部...
Backup Hydrogen Maser Steering System for Galileo Precise Timing Facility
Backup Hydrogen Maser Steering System Galileo Precise Timing Facility
2009/9/3
Two hydrogen masers (HMs) are used in the Precise Timing Facility to provide the physical realization of Galileo System Time, insuring the extremely high short-term stability required for the navigati...