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About Us

 
The Oregon DOT Geometrics Unit is operating and expanding the Oregon Real-time GNSS Network, a network of permanently installed, continuously operating GNSS reference stations.

System

The ODOT Geometronics Unit is responsible for enhancing and maintaining the vertical and horizontal geodetic control infrastructure across the state of Oregon. 
 
This GNSS network consists of GNSS Continuously Operating Reference Stations that provide real-time kinematic correctors to field GNSS users over the internet. GNSS users, that are properly equipped to take advantage of these correctors, can survey in the field to the one centimeter horizontal accuracy level in real-time.  RINEX files are also available for use in post-processing.

Partnership

ODOT Geometronics has partnered with other state and local government agencies, as well as educational institutions and private industry, to develop the ORGN. Our partners have contributed some of the facilities and GNSS equipment for the ORGN. In turn, Geometronics has purchased and is operating the GNSS network software that controls the network of CORS stations from central computers. The Geometronics Unit and ODOT regions have also provided many station sites and installed many GNSS sensors for the ORGN.

Scope of Network

Currently GNSS corrector coverage by the ORGN consists of several sub-networks, or clusters of stations in Oregon. Each sub-network consists of GNSS stations spaced at 70 km, more or less.
 
The Oregon Real-time GNSS Network is operated and controlled by ODOT using specialized GNSS network software (Leica GNSS Spider) running on servers at the Oregon Department of Transportation in Salem. The GNSS network software is used to configure and monitor the quality of data from the reference stations, compute GNSS correctors, and then provide GNSS correctors to field GNSS users. Correctors will be provided in real-time via the internet. GNSS data from reference stations will also be archived and available on-line in RINEX file format for users that need to post-process their field GNSS data.

Datum realization

The Oregon Real-time GNSS Network has transitioned to a new datum realization: NAD 83(2011) epoch 2010.00. Please visit our ORGN Coordinates page for more in depth information on this transition.  

GLONASS and Oregon GNSS Network

The Oregon Real-Time GNSS Network now has limited GPS + GLONASS (GG) coverage statewide.
 
The ORGN consists of approximately 100 reference stations: many of these sites are now GG-enabled as shown on our coverage map.   We are currently working on a plan to enable GLONASS on all ORGN sites.
 
For more information on how to use the ORGN GLONASS products, please read the document: “Oregon Real-time GNSS Network: GLONASS Products
 
You may also use the ODOT Geometronics Online Toolkit to view which ORGN sites that are GG-enabled.
Person installing a corrector 

Contact Information

Oregon Department of Transportation
Geometronics, MS 4
4040 Fairview Industrial Dr. SE
Salem, OR 97302
503-986-3103

Project Staff

Visit our Contact Us page for management and technical staff contacts.

Resources 

Getting Started with ORGN
National Geodetic Survey
Oregon Coordinate Reference System
ODOT Geometronics
Oregon GPS Users Group
Professional Land Surveyors of Oregon
UNAVCO Plate Boundary Observatory
US Coast Guard Navigation Center
Washington State Reference Network

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