[time-nuts] Loran transmitters back on the air.

[Greg Broburg]

A friend in Texas has confirmed that Loran signals are now up and 
receivers are showing position. I am including a note from UrsaNav 
regarding this event.

TIME FOR LIFE

UrsaNav Testing Wide-Area Timing Alternative

February 29, 2012. This week, for the first time since August 2010, 
advanced Low Frequency (LF) signals, including eLoran are on air in 
North America. As a result of a Cooperative Research and Development 
Agreement (CRADA) between the United States Coast Guard and UrsaNav, 
Inc. live testing of a wide-area precise timing solution has begun. 
These initial tests include a comprehensive pallet of signals, including 
eLoran, that are being evaluated for their ability to provide a robust, 
wide area, wireless precise timing alternative that can operate 
cooperatively with GPS, or during periods of GPS unavailability.

Globally, government, industry, and academic experts recognize that 
enhanced LF signals, such as eLoran, can provide alternative timing, 
either as a standalone service, or as a component of a Position, 
Navigation, and Timing (PNT) service. The LF signals operate 
independently of Global Navigation Satellite Systems (GNSS), such as 
GPS. This recognition has led to a cooperative approach, such as the 
CRADA, for testing and examining the benefits of a wide-area timing 
solution.

Additional on-air tests are planned at various sites throughout the 
United States. Broadcasts will test several different frequencies, 
waveforms, and modulation techniques using evolutionary, 
state-of-the-art technology. Reception of these broadcasts are planned 
at both on-shore and off-shore locations, and will include advanced LF 
data delivery techniques. The results of these trials will be presented 
at national and international conferences. Any party interested in any 
part of the trial, or interested in doing their own measurements are 
invited to contact us.

UrsaNav is uniquely positioned to help achieve the CRADA goals. We 
provide the worlds most advanced solutions for Low Frequency Alternative 
Positioning, Navigation, Timing, and Data, including high performance 
eLoran Timing Receivers. We have partnered with Symmetricom, the global 
leader in precise time synchronization, and Nautel, the industry-leading 
supplier of high-power RF transmitters. This “alliance of expertise” 
provides the foundation technology for the best wide area, terrestrial 
based alternative to satellite systems such as GPS. GLONASS, and Galileo.


U.S. Offices
Chris Stout
Vice President, LF Engineerng
757.312.0790
cstout at ursanav.com