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National Geodetic Survey guidelines for real time GNSS networks
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  • Alternative Title:
    Guidelines for real time GNSS networks
  • Description:
    "NOAA's National Geodetic Survey (NGS) is committed to continued support of accurate real time global navigation satellite system (GNSS) positioning across the USA and its territories. Users of GNSS technology show greater dependence on this methodology every day for important coordinates in their projects as well as for academic and scientific studies. Real time networks (RTN) of active reference stations streaming GNSS data in various formats, with or without correctors, are rapidly becoming a nationwide infrastructure operated by both public and private sectors alike. It is important that these RTN provide accurate, homogeneous, repeatable coordinates based on our national datums for many reasons. Geographic Information Systems (GIS), emergency management, national security, engineering projects, cartographic work, environmental studies, geophysical research, deformation modeling, cadastral data, municipal infrastructure and many other applications require that data are based on a common foundation as consistently maintained by NGS in our National Spatial Reference System (NSRS). For over 200 years, NGS has endeavored to provide this geodetic foundation for all positioning applications. To further that end, NGS has assembled a team of over 60 individuals from the public and geodetic communities, as well as a small number of GNSS manufacturers who are currently operating RTN in the US. Individuals from State Geodetic Surveys, Spatial Reference Centers, State Departments of Transportation, as well as NGS Geodetic Advisors and headquarters personnel have all contributed to this effort. The goal is to provide a much needed basis of general information for real time GNSS positioning in networks of active reference stations. This would include recommending procedures and approaches for aligning a RTN at acceptable levels to the NSRS and best methods to use the RTN with maximum precision and confidence. NGS is working in the real time (RT) positioning field to support RTN administrators and will not compete with RTN services supplied by any private or public RTN. NGS offers these guidelines as a dynamic document which will endeavor to keep pace with the rapid changes in satellite constellations, satellite signals and the increased capabilities of the GNSS manufacturers hardware, firmware and software"--Preface.

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