September 29, 2014, The U.S. Department of Transportation recently hosted a workshop to discuss implementation of a Global Positioning System (GPS) Adjacent Band Compatibility Assessment on September 18, 2014 at the U.S. Department of Transportation, John A. Volpe National Transportation Systems Center.
Discussion at this workshop focused on the various implementation steps of the GPS Adjacent Band Compatibility Assessment, including development of GPS receiver use cases, identification of representative GPS receivers, and development of a test and analysis program … More.
Presentations from the Workshop: Meeting Agenda
August 2, 2014, LOS ANGELES AIR FORCE BASE, Calif. -- The U.S. Air Force launched the seventh Global Positioning System (GPS) IIF satellite from Cape Canaveral AFS, Fla. at 11:23 p.m. EDT, Aug. 1.
The Boeing-built GPS IIF satellite provides greater navigational accuracy through improvements in atomic clock technology, adds a new third civil signal (L5) for commercial aviation and safety-of-life applications, and a longer design life of 12 years... More
June 19, 2014, Washington, D.C. – The Federal Communications Commission plans to issue the largest fine in its history against C.T.S. Technology Co., Limited, a Chinese electronics manufacturer and online retailer, for allegedly marketing 285 models of signal jamming devices to U.S. consumers for more than two years… More.
May 16, 2014, LOS ANGELES AIR FORCE BASE, El Segundo, Calif. -- The U. S. Air Force successfully launched the sixth Global Positioning System (GPS) IIF satellite carried aboard a United Launch Alliance Delta IV launch vehicle at 8:03 EDT from Cape Canaveral Air Force Station, Fla., May 16.
The Boeing-built GPS IIF satellite joins the GPS constellation providing global coverage and increased overall performance to users around the globe.… More
April 25, 2014, The Department of Defense announced that U.S. Air Force Space Command will begin broadcasting Civil Navigation (CNAV) messages on all operational GPS satellites capable of transmitting the L2C and L5 signals. These pre-operational signals are primarily used to test various equipment and should be employed at the users’ own risk; not used for safety-of-life or other critical purposes.
The implementation will take place in two phases. First, on April 28, 2014, the initial broadcast of CNAV message-populated L2C and L5 signals will occur at a reduced data accuracy and update frequency compared to the legacy GPS signals in wide use today. Second, in December 2014, CNAV data updates will increase to a daily rate, bringing L2C and L5 signal-in-space accuracy on par with the legacy signals. However, derived position accuracy cannot be guaranteed during the pre-operational deployment of the frequencies.
The Air Force will broadcast L2C messages with the health bit set “healthy,” as was the case during a June 2013 test. L5 messages will be set “unhealthy,” but as greater experience with the L5 broadcast and implementation of signal monitoring is achieved, this status may change upon review.
"The U.S. Department of Transportation is pleased with the collaborative effort and work of the CNAV tiger team, formed between the Office of the Secretary of Defense, Air Force Space Command, and the U.S. Department of Transportation, to address concerns about implementation of a pre-operational CNAV capability on the GPS L2C and L5 signals,” said Greg Winfree, assistant secretary for research and technology at USDOT.… More
Choosing the Right GPS Navigation Device for Commercial Motor Vehicles
March 11, 2013, US DOT Federal Motor Carrier Safety Administration (FMCSA) in conjunction with U.S. Senator Charles E. Schumer (NY) announced an effort to publicize that not all GPS navigation devices are created equal and that some navigation systems are designed specifically for commercial truck and bus drivers.
Why does it matter which navigation system you use?
If you use a navigation system that does not provide you with important route restrictions, such as low bridge overpasses, the shortcut you thought would save you time and fuel, may, in fact, end up costing you a lot more money than you bargained for… More