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Article: National Geodetic Survey.(Internet Resource of the Month)
- Article from:
- GEO World
- Article date:
- March 1, 2004
CopyrightCOPYRIGHT 2004 Bev-AL Communications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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http://www.ngs.noaa.gov/OPUS
The National Geodetic Survey (NGS) operates the Online Positioning User Service (OPUS) to provide Global Positioning System (GPS) users easier access to the National Spatial Reference System.
OPUS allows users to submit GPS data files to NGS, where the data will be processed to determine a position using NGS computers and software. Each data file submitted will be processed with respect to three Continuously Operating Reference Station (CORS) sites selected by distance, number of observations, site stability, etc. Positions for the data are reported back to users via e-mail in International Terrestrial Reference Frame (ITRF) ...