GPS and GNSS Surveying Systems White Papers
Trimble VISION TechnologyTrimble VISION technology integrates calibrated digital cameras with Trimble S6 and S8 total stations, as well as the Trimble VX Spatial Station. These instruments have the ability to collect survey data, stream video from the perspective of the instrument, and capture panoramic still images. Trimble Access field software overlays survey data on the streaming video, which enhances the surveyor's field productivity when operating the instrument robotically. Trimble Business Center office software overlays survey data on the captured panoramic still images, enabling the surveyor to efficiently document features that were surveyed. Trimble Business Center also enables the surveyor to make terrestrial photogrammetric observations and compute point coordinates using the
Trimble VISION images. Trimble VISION photogrammetry is a survey tool that precisely measures points which were previously time-consuming, dangerous, or impossible to collect using other techniques.
Trimble 360Advancements in global navigation satellite systems (GNSS) are increasing the number of available satellites and
satellite ranging signals to surveying professionals worldwide. To ensure surveyors benefit from the latest satellite
positioning technology as well as protect their investment in GNSS equipment and technology, Trimble offers the next
evolution in satellite tracking technology -- Trimble 360.
Trimble HD-GNSSGNSS carrier-phase processing has improved significantly since the development of the first algorithms for
precision satellite surveying. In keeping with these ongoing advancements, Trimble's new HD-GNSS processing
engine provides markedly reduced convergence times as well as high position and precision reliability when
compared to earlier processing engines, especially in poor GNSS environments.
Trimble SurePoint: Beyond GNSSAccurate GNSS survey measurements rely on the surveyor's ability to maintain the rover pole in a stable plumb
(sometimes called "level") attitude for the duration of point collection. Surveyors spend extra time in the field trying
to ensure that the rover pole is level when taking measurements. The Trimble R10 GNSS Receiver incorporates a
revolutionary attitude sensing technology, called Trimble SurePoint, to reduce the occupation time required to
collect accurate survey measurements and to provide an intuitive survey workflow.
Trimble xFill RTKTrimble xFill is a new service that extends RTK positioning for several minutes when the RTK correction stream is
not available. Trimble xFill corrections are broadcast by satellite, so they are generally available within covered
areas wherever the GNSS constellations are visible. Surveyors with access to the Trimble xFill service will benefit
from improved field productivity.
"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.
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.
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.