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Ephemeris Protection Level Equations and Monitor Algorithms for GBAS
Ephemeris Protection Level Equations Monitor Algorithms GBAS
2015/6/29
One troublesome failure mode for Ground Based Augmentation Systems (GBAS) is the possibility of large discrepancies between satellite locations in space and the locations derived by the ephemeris data...
Targeted Ephemeris Decorrelation Parameter Inflation for Improved LAAS Availability during Severe Ionosphere Anomalies
Targeted Ephemeris Decorrelation Parameter Inflation Improved LAAS Availability Ionosphere Anomalies
2015/6/25
The Local Area Augmentation System (LAAS) is a ground-based differential GNSS system designed to provide precision approach for aircraft landing at a LAAS-equipped airport.
Ephemeris Type A Fault Analysis and Mitigation for LAAS
Ephemeris Type Fault Analysis Mitigation LAAS
2015/6/25
The Local Area Augmentation System (LAAS) has been developed by the FAA to enable precision approach and landing operations using the Global Positioning System (GPS). Each LAAS installation provides s...
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...
Statistical Characterization of GLONASS Broadcast Ephemeris Errors
GLONASS Broadcast Ephemeris
2015/6/24
For critical navigation applications such as aircraft approach and landing, there is a general desire to use multi-constella-tion global navigation satellite systems (GNSS) to enhance availability and...
A Clock and Ephemeris Algorithm for Dual Frequency SBAS
Clock Ephemeris Algorithm Dual Frequency SBAS
2015/6/24
In the next years, the new GPS and Galileo signals (L1,L5) will allow civil users to remove the ionospheric delay in the pseudoranges. This will have a large impact on the Satellite Based Augmentation...
Qualifying an L5 SBAS MOPS Ephemeris Message to Support Multiple Orbit Classes
Qualifying SBAS MOPS Ephemeris Message Multiple Orbit Classes
2015/6/24
The L1 Minimum Operational Performance Standards (MOPS) were designed under the premise that Satellite Based Augmentation Systems (SBAS) be supported by communications satellites in geostationary orbi...
L1/L5 SBAS MOPS Ephemeris Message to Support Multiple Orbit Classes
SBAS MOPS Ephemeris Message Multiple Orbit Classes
2015/6/24
New satellite orbits ranging from highly eccentric inclined geosynchronous (IGSO), medium (MEO) to low Earth (LEO) orbits are being proposed for future Global Navigation Satellite Systems (GNSS) and S...
Evaluation of a covariance-based clock and ephemeris error bounding algorithm for SBAS
Evaluation covariance-based clock ephemeris error bounding algorithm SBAS
2015/6/24
The largest source of error uncertainty in current Space-based Augmentation Systems, which are single frequency (L1), is the ionospheric delay. In the coming years, the deployment of new signals in L5...
Space Gravity Spectroscopy - determination of the Earth’s gravitational field by means of Newton interpolated LEO ephemeris Case studies on dynamic (CHAMP Rapid Science Orbit) and kinematic orbits
space gravity spectroscopy spherical harmonics series expansion GPS tracked LEO satellites kinematic
2010/1/22
An algorithm for the (kinematic) orbit analysis of a Low Earth Orbiting (LEO) GPS tracked satellite to determine the spherical harmonic coefficients of the terrestrial gravitational field is presented...