NOAA's National Geodetic Survey recently announced the approval and release of a document titled "National Geodetic Survey User Guidelines for Single Base Real-Time GNSS Positioning." The guidelines provide definitive criteria to achieve various specific tiers of precision, with high confidence, using global navigation satellite systems (GNSS). Due to the plethora of variables associated with Real-Time (RT) GNSS positioning, a consistent documented approach for using this technology to best advantage was lacking. In preparing this publication, thousands of pages were researched to evaluate, refine, and compile comprehensive information into an integrated form, thereby ensuring the most practical and reliable methodologies were developed for high-precision work.
positioning is rapidly becoming the favored method for obtaining
centimeter-level coordinates and will continue as a dynamic technology, due to
advances in hardware and software, additional GNSS constellations, and
new signals available to the user. These guidelines will be updated as these
developments affect RT procedures and
The new document fills a void that exists
for RT GNSS positioning practitioners in two
Provides unbiased background information necessary
for RT users in the field
Provides specific procedures and criteria to
achieve 95% confidence with RT
It is anticipated that the background
information and best methods promoted in this document will become standard
reading to help professionals achieve accurate, consistent, and reliable data
for their work.
The guidelines may be found
For additional information, contact William.Henning@noaa.
NOAA Releases Real-Time Guidelines
April 30, 2010