City of Madison, Wisconsin GPS Community Base Station

Status Announcements

August 7, 2019 - WDOT replaced NetR9 receiver with new Trimle Alloy receiver.

May 29, 2019 - Trimble GPSBase (version 2.600) software taken out of service due to improved functionality of "FTP Push" that is now contained within the NetR9 receiver. Raw GPS data for post-processing now provided in Receiver Independent Exchange Format (RINEX) V2.11, not in other proprietary formats. RINEX V2.11 files include Observables & Ephemeris.

January 8, 2019 - In accordance with terms of WISCORS Cooperative Agreement No. 25-25-02-2008, WISDOT replaced City of Madison owned NetR5 with a new WISDOT owned NetR9 receiver.

August 26, 2016 - The software that controls the GPS base station has been upgraded to Trimble's GPSBase (version 2.600).

June 12 to 14, 2007 - Correction data was not being logged or sent to our web server from 6:00 AM June 12th to 9:00 AM June 14th due to a configuration problem with the computer at the base station.

June 12, 2007 - The base station was down from approximately 6:45 AM until 9:15 AM due to a power failure.

June 11, 2007 - Users can now view lists of correction data files stored on the server and manually download individual files.

April 20, 2007 - The software that controls GPS base station upgraded to Trimble's GPSBase (version 2.500). Correction data will only be available in DAT and Rinex formats. SSF and Almanac files are no longer produced. We are working to make the new correction data files accessable over the internet and hope to restore this service in the near future. Real-time correction data is still being broadcast in RTCM + RTK (version 2.2), and CMR+ formats.

August 29, 2006 - The 100 watt booster amplifier for the transmitter is out of service. A new booster amp has been ordered. Until the new amp is received, we will be broadcasting correction data with the 25 watt Trimble transmitter only. The coverage area will be significantly reduced.

September 06, 2005 - The reference position of this base station was changed at 8:10 AM (CDT).

August 04, 2003 - Retention period for downloadable data files increased from 15 days to 21 days for the hourly files and from 90 days to 180 days for the daily files.

January 14, 2003 - Reference position revised based on high-order control survey by Ayres Associates.

August 21, 2002 - Reference position calculated using OPUS. Correction files available for download on internet.


General base station information
GPS Control Points