Oregon Real-Time GPS Network
NOTICE: NEW DATUM REALIZATION FOR THE
OREGON REAL-TIME GPS NETWORK
On Friday, 8 March 2013, the Oregon Real-time GPS Network
(ORGN) was transitioned to a new datum realization: NAD 83(2011)
epoch 2010.00. Please visit our
Coordinates page for more in depth information on this
The Oregon DOT Geometronics Unit is operating and expanding the
Oregon Real-time GPS Network, a network of permanently installed,
continuously operating GPS reference stations.
The ODOT Geometronics Unit is responsible for enhancing and
maintaining the vertical and horizontal geodetic control
infrastructure across the state of Oregon. The establishment and
operation of the ORGN in Oregon helps us accomplish this mission.
This GPS network consists of GPS Continuously Operating Reference
Stations (CORS) that provide
real-time kinematic (RTK) correctors to field GPS users
over the internet. GPS 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
SCOPE OF NETWORK
Currently GPS corrector coverage by the ORGN consists of several
sub-networks, or clusters of stations in Oregon. Each sub-network
consists of GPS stations spaced at 70 km, more or less.
The Oregon Real-time GPS Network is operated and controlled by ODOT
using specialized GPS network software (Leica GNSS Spider) running
on servers at the Oregon Department of Transportation in Salem. The
GPS network software is used to configure and monitor the quality of
data from the reference stations, compute GPS correctors, and then
provide GPS correctors to field GPS users. Correctors will be
provided in real-time via internet connectivity. GPS 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
The 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 GPS equipment for the ORGN. In turn, ODOT
Geometronics has purchased and is operating the GPS network software
that controls the network of CORS stations from central computers.
The ODOT Geometronics Unit and ODOT regions also have provided
station sites and GPS sensors for the ORGN.