Defense

ANGELS, GSSAP, CNAV, and GPS: Guidance From Above

March 13, 2014By
A still from the movie Gravity, where space real estate feels really small. (credit: Warner Bros. Pictures)

Wow, what a bevy of acronyms. If you already know what they mean, great. If you don’t, just hang in and all will be made clear. E. L. Doctorow once wrote, “Writing is a socially acceptable form of schizophrenia.” Now, I am not sure how I feel about that or how my daughter who is a practicing Clinical Psychologist (PsyD) would interpret... read more

This article is tagged with and posted in Defense PNT Newsletter, Newsletter Editorials

PNT Advisory Board Hears Air Force CNAV Plan

March 12, 2014By
PNTAdvBd-O

The U.S. National Space-Based Positioning, Navigation, and Timing (PNT) Advisory Board has published the minutes of its December 4–5, 2013, meeting, opening with a quote from Albert Einstein, “We cannot solve our problems with the same thinking we used when we created them,” courtesy of Board Chair Dr. James Schlesinger. Among many other topics addressed, the Board heard a report... read more

Airbus Helicopters Selects Honeywell Navigation System

February 25, 2014By

Honeywell Aerospace’s LASEREF VI navigation system has been selected by Airbus Helicopters for its light helicopter platforms, the EC145 T2 and EC645 T2 family. The LASEREF inertial reference unit (IRU) allows helicopter operators to always have an autonomous navigation source available in the absence of a GNSS and radio navigation. The capability is especially useful when navigating during a mission... read more

GNSS Vulnerable: What to Do?

February 18, 2014By

Too Much Sensitivity, Not Enough Robustness, Says Parkinson Brad Parkinson, the founding architect of GPS, told a UK conference that the system needs to be made more robust to ensure worldwide availability of services to users. His concerns over GPS availability relate to threats such as the loss of authorized frequency spectrum (implicitly creating licensed jammers), space weather due to... read more

The Gold Standard: What’s in a Name?

February 12, 2014By
Don Jewell

Our esteemed editor-in-chief and publisher at GPS World, Alan Cameron, penned an editorial in January concerning claims made by the People’s Republic of China regarding the Gold Standard for PNT (position, navigation and timing). The Chinese recently claimed that its BeiDou system averaged a user range error (URE) of 2.5 meters using zero age of data (ZAOD), 95% of the... read more

GPS III Payload Facing Delays

February 11, 2014By

Gen. William Shelton, chief of Air Force Space Command, said the date when prime contractor Lockheed Martin and payload manufacturer Exelis are expected to have the first GPS satellite ready for launch will slip from its original target at the end of this fiscal year, according to National Defense Magazine. Technical difficulties are slowing the development process, he said. “We’re... read more

Next-Generation Clock Increases Stability to 300 Picoseconds

February 11, 2014By
Schreiver-Master-Clock-O

The U.S. Naval Observatory’s Alternate Master Clock on Schriever Air Force Base received its second rubidium fountain clock February 4 to ensure it has the most precise time in the world. Both the USNO’s Washington D.C.-based primary and its local Alternate Master Clock facility serve as the Department of Defense’s common time reference. Additionally, the USNO monitors the GPS constellation... read more

Exelis Reaches GPS OCX Milestones for Navigation and Encryption Software

January 31, 2014By

Exelis has successfully completed several software upgrades for the new Global Positioning System Next Generation Operational Control System, or GPS OCX.  Integration and testing were recently conducted on iteration 1.5 of the OCX navigation, encryption and Mission Upload Generator, or MUG, software. The new version of GPS software will help ground controllers better understand the satellites’ exact positioning in space.... read more

This article is tagged with and posted in Defense News, GNSS News, GPS Modernization, Latest News, Precision Guidance