Engineering topics
Bertiger, Willy
Publications and source records attributed to Bertiger, Willy.
BeiDou Orbit Determination Processes and Products in JPL's GDGPS System
No abstract available
Recent Advances in Realizing the Terrestrial Reference System from GPS
No abstract available
20 Years of Precision Orbit Determination for Altimetry with GPS
No abstract available
Accuracy and Stability of a Terrestrial Reference Frame Realized from GPS Data
No abstract available
Next Generation GPS Ground Control Segment (OCX) Navigation Design
In February 2010, a Raytheon-led team was selected by The Air Force to develop, implement, and operate the next generation GPS ground control segment (OCX). To meet and exceed the demanding OCX navigation performance requirements, the Raytheon team partnered with ITT (Navigation lead) and JPL to adapt major elements of JPL's navigation technology, proven in the operations of the Global Differential GPS (GDGPS) System. Key design goals for the navigation subsystem include accurate ephemeris and clock accuracy (user range error), ease of model upgrades, and a smooth and safe transition from the legacy system to OCX.We will describe key elements of the innovative architecture of the OCX navigation subsystem,and demonstrate the anticipated performance of the system through high fidelity simulations withactual GPS measurements.
One-Centimeter Orbits in Near-Real Time: The GPS Experience on OSTM/JASON-2
The advances in Precise Orbit Determination (POD) over the past three decades have been driven in large measure by the increasing demands of satellite altimetry missions. Since the launch of Seasat in 1978, both tracking-system technologies and orbit modeling capabilities have evolved considerably. The latest in a series of precise (TOPEX-class) altimeter missions is the Ocean Surface Topography Mission (OSTM, also Jason-2). GPS-based orbit solutions for this mission are accurate to 1-cm (radial RMS) within 3-5 hrs of real time. These GPS-based orbit products provide the basis for a near-real time sea-surface height product that supports increasingly diverse applications of operational oceanography and climate forecasting.
Extending GPS orbit and clock products to high rate GPS satellite clock solution
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GRACE: from measurement to gravity
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Single Frequency GPS Orbit Determination for Low Earth Orbiters
A number of missions in the future are planning to use GPS for precision orbit determination. Cost considerations and receiver availability make single frequency GPS receivers attractive if the orbit accuracy requirements can be met.