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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 ...
Performance of a Doppler-Aided GPS Navigation System for Aviation Applications under Ionospheric Scintillation
Performance Doppler-Aided GPS Navigation System Aviation Applications Ionospheric Scintillation
2015/6/25
Aircraft landing using the Global Positioning System (GPS) in equatorial regions is more difficult than in other regions because ionospheric scintillation is prevalent.Ionospheric scintillation causes...
Availability Benefit;Future Dual Frequency GPS Avionics;Ionospheric Scintillation
Availability Benefit Future Dual Frequency GPS Avionics Ionospheric Scintillation
2015/6/25
With the launch of the GPS-IIF satellites, the new civil navigation signals at L5 (1176.45 MHz) will become available to the GNSS community.One of the most significant benefits introduced by this new ...
Availability Benefit of Future Dual Frequency GPS Avionics under Strong Ionospheric Scintillation
Availability Benefit Future Dual Frequency GPS Avionics Ionospheric Scintillation
2015/6/25
A Global Positioning System (GPS) receiver may lose carrier tracking lock to the GPS signal under deep and frequent fades due to ionospheric scintillation. The frequent loss of lock observed during a ...
Sigma Overbounding using a Position Domain Method for the Local Area Augmentaion of GPS
Sigma Overbounding Position Domain Method Local Area Augmentaion GPS
2015/6/25
The local area augmentation system (LAAS) is a differential GPS navigation system being developed to support aircraft precision approach and landing navigation with guaranteed integrity and availabili...
GPS Ephemeris Error Screening and Results for 2006–2009
GPS Ephemeris Error Screening Results
2015/6/25
For the Global Positioning System (GPS), real-time satel-lite orbits and clock biases are derived from predicted ephemeris and clock parameters in broadcast navigation messages. The performance of bro...
GPS in Mid-life with an International Team of Doctors:Analyzing IIF-1 Satellite Performance and Backward-Compatibility
GPS Mid-life with International Team Doctors:Analyzing IIF-1 Satellite Performance
2015/6/25
With the launch of the first GPS IIF satellite, IIF-1 or SVN 62 on May 27, 2010, the U.S. GPS enters its mid-life. The IIF-1 satellite is the very first GPS satellite with an operable L5 payload. The ...
Alternative Characterization of Analog Signal Deformation for GNSS‐GPS Satellites
Analog Signal Deformation GNSS‐GPS Satellites
2015/6/24
Currently, analog signal deformation is described using individual-chip step response curves for each GPS/WAAS-GEO satellite. Such a set of curves is helpful– it allows us to have an overall idea of t...
Availability Impact on GPS Aviation due to Strong Ionospheric Scintillation
Availability Impact GPS Aviation due Strong Ionospheric Scintillation
2015/6/24
Strong ionospheric scintillation due to electron density irregularities inside the ionosphere is commonly observed in the equatorial region during solar maxima. Strong amplitude scintillation causes d...
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...
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...
Calibrating adaptive antenna arrays for high-integrity GPS
Space–time adaptive processing GPS adaptive antennas STAP
2015/6/24
A major challenge in using GPS guidance for aircraft final approach and landing is to reject interference that can jam reception of the GPS signals. Antenna arrays,which use space-time adaptive ...
The Impact of GPS Modernization on Standalone User Performance and Integrity with ARAIM
Impact GPS Modernization Standalone User Performance Integrity ARAIM
2015/6/24
Advanced RAIM, or ARAIM, extends and improves upon the traditional RAIM algorithm to detect and mitigate independent, multiple, and correlated GPS signal faults. While ARAIM depends on multiple redund...
Single Antenna GPS Spoof Detection that is Simple,Static, Instantaneous and Backwards Compatible for Aerial Applications
Single Antenna GPS Spoof Detection Simple Static Instantaneous Backwards Compatible Aerial Applications
2015/6/24
Despite the antenna’s privileged position as the first line of defense against interferers, jammers and spoofers, most detection and mitigation techniques are realized in the receiver’s backend ...