A new ionospheric model for wide area differential GPS: the multiple shell approach
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GPS WADGPS total electron content ionosphere valid↗
Engineering topics
Runge, T. F.
Publications and source records attributed to Runge, T. F..
A new ionospheric model for wide area differential GPS: the multi-shell approach
In this paper we report on recent developments we made concerning a WADGPS ionospheric model. The new model is a simple extension of the currently used single- shell ionospheric model.
GPS WADGPS total electron content ionosphere valid↗
A new ionospheric model for wide area differential GPS: the multiple shell approach
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Global Positioning System (GPS)↗
A Kalman-Filter-Based Approach to Combining Independent Earth-Orientation Series
An approach. based upon the use of a Kalman filter. that is currently employed at the Jet Propulsion Laboratory (JPL) for combining independent measurements of the Earth's orientation, is presented. Since changes in the Earth's orientation can be described is a randomly excited stochastic process, the uncertainty in our knowledge of the Earth's orientation grows rapidly in the absence of measurements. The Kalman-filter methodology allows for an objective accounting of this uncertainty growth, thereby facilitating the intercomparison of measurements taken at different epochs (not necessarily uniformly spaced in time) and with different precision. As an example of this approach to combining Earth-orientation series, a description is given of a combination, SPACE95, that has been generated recently at JPL.
Gross, Richard S.↗
TEMPO:Determining, Combining, and Predicting Earth Orientation Parameters For Spacecraft Navigation
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Earth orientation Parameters Spacecraft Navigation↗
TEMPO: Determining, Combining, and Predicting Earth Orientation Parameters for Spacecraft Navigation
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TEMPO GPS (Global Positioning System) polar motion↗
A Kalman Filter-Based Approach to Combining Independent Earth Orientation Series
An approach, based upon the use of a Kalman filter, that is currently employed at the Jet Propulsion Laboratory (JPL) for combining independent measurements of the Earth's orientation is presented.
Kalman↗
TEMPO: Determining, Combining, and Predicting Earth Orientation Parapeters for Spacecraft Navigation
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Observations VLBI GPS↗
Determining, Combining, and Predicting Earth Orientation Parameters for Spacecraft Navigation
A description is given of the operational JPL project to measure, combine, and predict Earth rotation parameters in support of spacecraft navigation.
Observations TEMPO Deep Space Network DSN↗
Design of a Ground-based GPS System to Provide Near Real Time Estimates of Precipitable Water Vapor
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radiosonde launches PWV GPS receivers↗
Phase Calibration for the Block 1 VLBI System
Very Long Baseline Interferometry (VLBI) in the DSN provides support for spacecraft navigation, Earth orientation measurements, and synchronization of network time and frequency standards. An improved method for calibrating instrumental phase shifts has recently been implemented as a computer program in the Block 1 system. The new calibration program, called PRECAL, performs calibrations over intervals as small as 0.4 seconds and greatly reduces the amount of computer processing required to perform phase calibration.
Roth, M. G.↗