Signal Deformation Monitoring for Dual- Frequency WAAS
نویسندگان
چکیده
R. Eric Phelts, Ph.D., is a research engineer in the Department of Aeronautics and Astronautics at Stanford University. He received his B.S. in Mechanical Engineering from Georgia Institute of Technology in 1995, and his M.S. and Ph.D. in Mechanical Engineering from Stanford University in 1997 and 2001, respectively. His research involves signal deformation monitoring techniques and analysis for SBAS and GBAS.
منابع مشابه
Bounding Errors Caused by Nominal GNSS Signal Deformations
Nominal signal deformations are present in GNSS-GPS and WAAS-GEO satellite signals. They result in pseudorange errors, which in turn cause navigation errors for GNSS users. These navigation errors depend on the userand reference-receiver configuration parameters as well as satellite geometry and user location. Previous papers by the authors focused on obtaining a better understanding of the pse...
متن کاملValidating Nominal Bias Error Limits Using 4 years of WAAS Signal Quality Monitoring Data
Nominal signal deformations are small imperfections of GNSS signals that cause them to differ from one another. While generally small, they exist on all SV signals and potentially lead to user range biases that are present all the time. These subtle effects have been measured in the past using specialized equipment and processing techniques and also using more conventional receivers as well. Au...
متن کاملNear Term Improvements to WAAS Availability
Since 2003, when it was first declared operational, the Wide Area Augmentation System (WAAS) has been increasing its availability through successive software updates (for example, new monitoring algorithms) and hardware updates (expanded reference receiver network). Today, WAAS provides vertical guidance to more than 3000 runways in the United States. With the current GPS constellation, WAAS ha...
متن کاملToward Real-Time SQM for WAAS: Improved Detection Techniques
Signal Quality Monitoring (SQM) algorithms propose to detect anomalous signal distortions primarily through the use of SQM receivers. These receivers employ anywhere from three or more correlator pairs per channel—each slaved to the tracking pair. The measurements from each correlator output can be used to form detection metrics, which are, in general, simple algebraic combinations of the measu...
متن کاملVertical Guidance Performance Analysis of the L1–L5 Dual-Frequency GPS/WAAS User Avionics Sensor
This paper investigates the potential vertical guidance performance of global positioning system (GPS)/wide area augmentation system (WAAS) user avionics sensor when the modernized GPS and Galileo are available. This paper will first investigate the airborne receiver code noise and multipath (CNMP) confidence (σair). The σair will be the dominant factor in the availability analysis of an L1-L5 ...
متن کامل