National Public Radio has recently discovered the many interesting issues surrounding GPS, thanks to author Greg Milner and his new book "Pinpoint: How GPS is Changing Technology, Culture and our Minds".  Have a listen: Science Friday with Ira Flatow:  How GPS May be...

05.09.16 by DAVID RUDIN@DavidSRudin If an object does not exist on a map, does it exist at all? Do you? You can see it with your own two eyes, and yet it is exists outside your world. In the early days of mapping, when much of the world was unknown, such discoveries...

"Pinpoint: How GPS Is Changing Technology, Culture and Our Minds" (Norton, 2016), by journalist Greg Milner, is a fascinating look at the history of GPS, the way it has transformed society through a myriad of unintended uses. Some interesting sound bites to whet your...

Site editor's note: The author discusses concerns about jamming and spoofing on the Indian subcontinent. VIDYA SAGAR REDDY | Fri, 6 May 2016-08:05am, Mumbai, dna The deployment of the seventh satellite successfully completed the Indian Regional Navigation Satellite...

BY GREG MILNER The radio signal that is the lifeblood of the Global Positioning System originates from a constellation of twenty-four satellites, orbiting more than twelve thousand miles above Earth. When it reaches the ground, after about sixty-seven milliseconds, it...

On the 8th of April the Secure World Foundation hosted a distinguished panel discussing the challenges and need to protect the GPS spectrum. The panel included: Dr. Christopher Hegarty: Director, CNS Engineering and Spectrum, The MITRE Corporation Mr. James J. Miller:...

Many analysts are concluding that a Request for Information (RFI) for Assured PNT (A-PNT) recently published by the Army is the next step in the administration’s process to procure an eLoran network to complement and backup the Global Positioning System (GPS). The RFI...

As we make the grid more efficient, GPS time becomes more important to keeping it going. Here is a new presentation by Kevin M. Skey and Dr. Michael L. Cohen of MITRE. Here is a graphic of all the places the grid uses time.

REUTERS, 1 May 2016 SEOUL/LONDON | BY JACK KIM AND JONATHAN SAUL [Blog Editor's Note - While maritime needs are discussed in this article, all modes of transport (including aviation) and all technologies need a complementary and backup PNT system for when GPS is...

Wednesday,May 4, 2016 11:00 a.m. - 12:00 p.m. ET Precision Time is becoming increasingly important in many industries. Applications and industries that benefit from accurate time include: Mobile Networks Power & Smart Grid Finance Industrial Automation Automotive...

In December Deputy Secretary of Defense Work co-signed a letter to five Congressmen sharing their concern about GPS vulnerability and the need for a complementary and backup system.  He said that the administration was pursing an eLoran timing network while...

“Accurate position, navigation, and timing is necessary for the function and integrity of many critical infrastructure sectors, such as the electric grid, communication networks, and financial institutions,” said DHS Under Secretary for Science and Technology Dr....

The US Army published another Request for Information (RFI) for Assured-PNT Monday. One of its interesting features is that it describes eLoran as a pseudo-satellite or "pseudolite."  Pseudolites are ground-based transmitters that provide the same information and...

Norway has reacted to the GPS timing errors at the end of January by halting demolition of their Loran infrastructure. Here is an interesting article from the Norwegian Armed Forces Forum on how the SVN-23 timing errors were viewed and the steps being taken by one...

While comprehensive information about North Korea’s most recent spate of GPS jamming has yet to be made available, additional and intriguing bits continue to appear every couple of days. North Korea began jamming on the 31st of March and the last incident so far was...

Guest Post by Mr. Charles Schue, CEO, UrsaNav, Inc. Over the past several days, North Korea has “reached across its borders” to jam GPS signals in South Korea. This had been a yearly occurrence for a while happening in 2010, 2011, and 2012. Its resurgence this year...

Juniper Networks, in partnership with the U.S. Department of Homeland Security, will host a special event at the New York Stock Exchange on Tuesday, April 19, 8:30-11:30 a.m. Attend the Opening Bell Viewing, followed by briefings of why precision timing is so critical...

Contradicting initial reports in the New York Times of no impact, the South Korean KBS News Radio reported that maritime and aviation traffic has been disrupted. This aligns with reports published by the BBC and other outlets. 5 April 2016 Korea Times Report BBC...

South Korean officials have reported that their neighbors to the north are, once again, jamming GPS signals, according to an item in the New York Times. The report says that the jamming is weaker than in previous events and that air and ship traffic and...

Blog Editor Note: In December a group of Congressmen wrote to Deputy Secretary Mendez at the Department of Transportation objecting to DoT's plans to demolish and dispose of  National Differential GPS infrastructure. They agreed that some signals may be needed, but...

Guest Post By Joseph Kunches Most people know that disturbed space weather conditions can adversely impact GPS to various degrees. The Sun can roil the ionosphere and make signal propagation from satellites to the ground tricky or impossible. The good news is that...

The following was published by the Norwegian media outlet Bladet Vestralen. Translation Courtesy of Mr. Jens Hoxmark and Prof. David Last Loran Demolition stopped By Mareno Leonhardsen Published:17 March 2016 Bø: Minister of Transport and Communications Ketil...

Guest Post by Stephen Bartlett, Vice President UrsaNav Corp. On March 8, 2016, UrsaNav, as part of the terms of a Cooperative Research and Development Agreement (CRADA) with the Department of Homeland Security (DHS) Science and Technology Directorate, successfully...

The Metro section of the Washington Post had an article yesterday: "Robbers allegedly tracked gambler with GPS they hid on car." It gets better. There was another GPS enabled tracker on this guy's car placed there by an investigator hired by his wife. The story has...

Guest Post by Professor David Last Satellite navigation may be the most successful innovation of recent decades among science-based industries. As the number of receivers world-wide soars past 2 billion, GPS has been joined by Russia’s GLONASS, China’s Compass-Beidou,...

During the GPS anomaly on the 25th and 26th of January users had up to six satellites in view transmitting erroneous time signals. According to John Lavrakas, President of Advance Research Corporation, 15 of the 31 GPS satellites were affected by the SVN23-related...

Telecommunications systems around the world, broadcast systems in Europe, and Public Safety radios and aviation ground systems in the United States were among the technologies reported to the US government as being impacted by the GPS anomaly on the 25th and 26th of...

Last week the National Institute of Standards and Technology announced that it wanted to fund development of an eLoran receiver that would fit on a microchip and could be easily incorporated into a variety of systems. The agency said its interest in this project was...

UK radio disturbance caused by satellite network bug By Chris Baraniuk, Technology reporter BBC.Com An error with the Global Positioning System (GPS) network has been blamed for causing problems with digital radio broadcasts last week. The US Air Force said that...

By: Tom Roeder Gazette.com February 1, 2016 The Defense Department's top researchers want ground-based miniature atomic clocks to avert a global catastrophe if the orbiting timepieces that make up the Colorado Springs-based Global Positioning System stop ticking. The...

"Inside GNSS" Dee Ann Divis, January 29, 2016 Less than a month after Europe switched off most of its Loran transmitters, a problem with GPS satellite timing signal triggered alarms across the continent and caused an unknown number of outages, including the disruption...

"Air Force Official Press Release - GPS Ground System Anomaly: On 26 January [2016] at 12:49 a.m. MST, the 2nd Space Operations Squadron at the 50th Space Wing, Schriever Air Force Base, Colo., verified users were experiencing GPS timing issues. Further investigation...

At 15:36 Greenwich Mean Time yesterday, GPS satellite SVN 23/PRN 32, the oldest satellite in the GPS constellation, became unusable. It was taken out of service at 22:00 GMT. See Notice. Although this was supposed to have been a routine decommissioning, reports from...

United States Coast Guard Marine Safety Alert 19 January 2016                                                                               Safety Alert 01-16 Global Navigation Satellite Systems – Trust, But Verify Report Disruptions Immediately Do you know what...

Christian Science Monitor - Passcode In 2011, Iran spoofed – or faked – Global Positioning System signals to send a CIA drone off course. Did it do the same to trick Navy vessels into Iranian waters? Opinion: Were US sailors 'spoofed' into Iranian waters? By Dana A....

Christian Science Monitor - Passcode 8 January 2016 By Joe Uchill From a command center at Schriever Air Force Base, about 10 miles outside Colorado Springs, Colo., seven 20-something airmen are responsible for safeguarding global financial markets, international...

7 January 2016 Taviga welcomes the continued transmission of eLoran timing and data signals from the UK Lydbrook, Gloucestershire, UK Low frequency eLoran transmissions from Anthorn in Cumbria (UK) will continue despite the switch off of the legacy Loran-C...

Loran signals from France, Norway, Denmark and Germany were terminated on the 31st of December 2015 in accordance with longstanding plans. The United Kingdom's signal is still on air being transmitted from their facility at Anthorn. Signals were terminated as a result...