OVERVIEW

The Ohio Department of Transportation, Office of Aerial Engineering operates a network of GPS Continuously Operating Reference Stations (CORS) in the State of Ohio providing data for post-processed and real-time positioning applications. This GPS network currently consists of 52 stations strategically placed across Ohio with a few in Kentucky and West Virginia. All reference stations are linked to a series of computers located at the State of Ohio Computing Center in Columbus, Ohio.

DATA AVAILABILITY

All 52 of the ODOT network CORS are currently part of the National Geodetic Survey (NGS) - National CORS network. One second rinex format GPS data is available for these stations through the NGS webpage.

http://www.ngs.noaa.gov/CORS

One second rinex and Trimble “dat” format GPS data is available through the ODOT CORS ftp site.

ftp://cors.dot.state.oh.us/

Real-time data is available for registered users via cell phones or wireless modems. Currently this service is FREE. Once our webpage and a few other items are completed we anticipate charging an annual fee to help defray some of the maintenance costs.

(Current RTK correction formats supported: RTCM 2.3, RTCM 3.0 and CMR+.)

GNSS UPGRADE

During the first half of 2007, we began to upgrade the network by replacing our old receivers with new units that support the modernized GPS L2C and L5 signals as well as GLONASS L1/L2 signals. GNSS receivers have been installed in the green highlighted area shown on the map below.

BENEFITS

·  Tie all projects to permanent reference points. (State Plane Coordinate System)

·  Saves time, increases productivity.

·  Quality Control. (consistent position on base)

USING THE NETWORK

·  Users will need their own wireless data plan and cell phone or wireless modem.

If you are interested in using the system, please send your request or email your request to:

Ohio Department of Transportation

Office of Aerial Engineering

1602 W. Broad St.

Columbus, OH 43223

E-mail:

Main Number: 614-275-1359

Fax Number: 614-275-1673

Please provide the following information with your request:

Name:*

Title:*

Company:*

Street Address:*

City:*

State: * Zip:*

Phone:* Fax:

E-mail:*

Wireless data service provider:

Wireless equip: (make/model)

GPS Receiver: (Make/Model)

Data collector: (make/model/ software/version)

Suggested login and password:

(Required *)

Ohio Department of

Transportation

ODOT’s Real-Time

Network

Information

Guide