Research and White Papers for GPS Survey Systems
| GPS Surveying System White Papers “Tracking New Signals from Space – GPS Modernization and Trimble R-Track Technology” white paper, Trimble 2004The US DoD (Department of Defense) is modernizing GPS (Global Positioning System) with new civilian satellite signals, thus presenting a challenge to companies who develop surveying products utilizing GPS technology. "Trimble Integrated Surveying Techniques" white paper, Trimble 2005This paper describes how Trimble products support Integrated Surveying for real-life survey applications. It also discusses techniques that combine, transfer and process data from GPS and conventional instruments. The techniques are applied to real-world survey applications to provide customers with an understanding of how Integrated Surveying can increase survey productivity. Defining the Future of Satellite Surveying with Trimble R-Track Technology White Paper, Trimble 2006In the next decade we will continue to see user equipment enhancements, but there will also be developments in the worldwide space segment, or GNSS (global navigation satellite systems)... "Bluetooth Technology for the Field Surveyor" white paper, Trimble 2003This paper explains Bluetooth technology and outlines its significant benefits for surveyors when integrated in Trimble products. Will Galileo and GPS L5 Obsolete Network RTK?, GNSS 2004Theoretical analyses and simulations show that with the presence of a reference station network, RTK initialization and positioning accuracy are improved considerably. Factorized Multi-Carrier Ambiguity Resolution, ION 2004The proposed addition of a third carrier to the modernized GPS as well as the implementation of three carriers in the planned Galileo system will boost the performance of carrier-phase based positioning within the next decade. In principle, highly-reliable instantaneous (one-epoch) ambiguity resolution becomes feasible for a broad range of applications. Galileo Modernized GPS - A New Challenge to Network RTK, ION 2004Several preliminary studies have demonstrated that with the third/fourth frequency available from GALILEO and modernized GPS, the reliability and productivity of single base OTF (on the fly) initializations at the rover increase dramatically when comparing with a dual frequency RTK system. “eRTK: A New Generation of Solutions for Centimeter-Accurate Wide-Area Real-Time Positioning” white paper, Trimble 2001Trimble has developed a new RTK technology, termed eRTK, that further enhances GPS surveying. A highly flexible choice of infrastructure and communications media, coupled with eRTK rover technology provides a unique new range of solutions for wide area RTK coverage which can be easily customized to meet exact and specific user requirements. FAMCAR Approach for Efficient Multi-Carrier Am., GNSS 2004In the past years, starting with an existing technique a new and very efficient ambiguity resolution algorithm has been developed. “GPS Antenna Design and Performance Advancements: The Trimble Zephyr Antenna” white paper, Trimble 2001The Trimble Zephyr and Zephyr Geodetic antennas are two new types of survey-grade, dual-frequency, GPS antenna. They are designed to match the performance of the chokering antenna, while being smaller, lighter, and significantly less expensive. |
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