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During an autoland flight test of Stanford’s Integrity Beacon Landing System in October 1994, one approach was aborted before landing due to a temporary satellite outage. Analysis showed that both the...
The Effects of the Ionosphere and C/A Frequency on GPS Signal Shape:Considerations for GNSS-2
Effects Ionosphere C/A Frequency GPS Signal Shape Considerations
2015/6/29
By greatly increasing the chipping rate of the pseudo random noise (prn) code, it may be possible to measure the ionosphere (TEC) in near real time, by exploiting the dispersive nature of the ionosphe...
Multicorrelator Techniques for Robust Mitigation of Threats to GPS Signal Quality
Multicorrelator Techniques Robust Mitigation GPS Signal Quality
2015/6/29
Many applications that utilize the Global Positioning System (GPS) demand highly accurate positioning information. Safety-critical applications such as aircraft navigation require position solutions w...
GPS Signal-in-Space Anomalies in the Last Decade:Data Mining of 400,000,000 GPS Navigation Messages
GPS Signal-in-Space Data Mining GPS Navigation Messages
2015/6/25
For the Global Positioning System (GPS), signal-in-space(SIS) performance is key to the positioning accuracy and the integrity. In practice, SIS anomalies occasionally happens and the consequent user ...
Secure Location Verification A Security Analysis of GPS Signal Authentication
Location Verifi cation GPS Signal Authentication Geosecurity
2015/6/25
The use of location based services has increased significantly over the last few years. However, location information is only sparsely used as a security mechanism. One of the reasons for this i...
Correlation of GPS signal fades due to ionospheric scintillation for aviation applications
Ionospheric scintillation Global Positioning System (GPS) Wide Area Augmentation System (WAAS) Aviation Availability
2015/6/24
Deep and frequent Global Positioning System (GPS) signal fading due to strong ionospheric scintillation is a major concern for GPS-guided aviation in equatorial areas during high solar activity. A GPS...
Statistical Characterization of GPS Signal-In-Space Errors
Statistical Characterization GPS Signal-In-Space Errors
2015/6/24
For most Global Positioning System (GPS) standard posi-tioning service (SPS) users, real-time satellite orbits and clocks are derived from predicted ephemeris and clock parameters in broadcast navigat...
GPS Signal-in-Space Integrity Performance Evolution in the Last Decade
GPS Signal-in-Space Integrity Performance Evolution Last Decade
2015/6/24
Knowledge of the Global Positioning System (GPS)signal-in-space (SIS) anomalies in history has a great importance for not only assessing the general performance of GPS SIS integrity but also validatin...
MULTISTATION ESTIMATING OF GPS SIGNAL ATMOSPHERIC DELAYS BY UNDIFFERENCED OBSERVATIONS
GPS Real-time Algorithms Software Tracking
2015/5/29
Precise RTK positioning is usually performable only on short length bases, to limit distance correlated biases, as atmosphere and ephemerides. However, it is possible to recover some residual biases a...
RESEARCH ON MATCH OF GPS SIGNAL AND ROAD INFORMTION FOR MOBILE NAVIGATION SYSTEM
Navigation GIS GPS Integration Topology Algorithms
2014/12/30
This paper presents two matching methods for mobile navigation system. One is on the basis of Index of Divided Zone and Dichotomy fuzzy Lookup; the other is on the basis of Road Network Topology and E...