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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...
A Real-Time Signal Quality Monitor For GPS Augmentation Systems
Real-Time Signal Quality Monitor GPS Augmentation Systems
2015/6/29
The Local Area Augmentation System (LAAS) and the Wide Area Augmentation System (WAAS) are ground based applications of differential GPS to support aircraft terminal navigation and precision approach.
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...
Evaluation of Signal in Space Error Bounds to Support Aviation Integrity
Evaluation of Signal in Space Error Bounds to Support Aviation Integrity
2015/6/25
The modernization of GPS and the addition of new GNSS constellations bring forth a multitude of new signals with new capabilities. One of the intended purposes of some of these new signals is the prov...
Evaluation of Signal in Space Error Bounds to Support Aviation Integrity
Evaluation Signal Space Error Bounds Support Aviation Integrity
2015/6/25
In order to make use of signals over which they have no control, aviation authorities must have a clear understanding of the commitments and capabilities of these new signals. This paper proposes equa...
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...
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...
Data and Pilot Combining for Composite GNSS Signal Acquisition
Data Pilot Combining Composite GNSS Signal Acquisition
2009/9/3
With the advent of new global navigation satellite systems (GNSS), such as the European Galileo, the Chinese Compass and the modernized GPS, the presence of new modulations allows the use of special t...