GNSS

ITT Exelis Completes Milestone for GPS III Constellation

October 4, 2012By

 ITT Exelis has passed a major milestone for the U.S. Air Force’s Global Positioning System III (GPS III) program. The company has successfully completed acceptance testing of the navigation payload element for the GPS III Non-Flight Satellite Testbed (GNST), and shipped the pathfinder unit to prime contractor Lockheed Martin’s facility near Denver, Colo., for thermal vacuum testing and space vehicle... read more

This article is tagged with , and posted in Government News, GPS Modernization

JAVAD Tracks L5 Signals from Indian GAGAN Satellite

October 4, 2012By
1

JAVAD GNSS has commented on some news that its receivers can track a new L5 signal from the Indian SBAS satellite, GSAT-8, launched on May 20.  In a further explanation to GPS World, CEO Javad Ashjaee explained, “All owners of our products can track it. The only thing is that if customers have not updated their firmware for a long time,... read more

This article is tagged with and posted in Augmentation & Assistance, GNSS News

GPS IIF-3 Satellite Now Transmitting L1, L2 Signals

October 4, 2012By
A Delta IV rocket lifts-off with an advanced GPS satellite from Cape Canaveral on Thursday. (Credit: ULA/Atkeison).

Video of launch. UPDATE: The SVN65/PRN24 L5 transmitter has now been switched on. L5 is the civilian safety-of-life GPS signal, designed to meet demanding requirements for safety-of-life transportation and other high-performance applications. UPDATE: The GPS Block IIF-3 satellite, SVN65, began transmitting L1 and L2 signals as PRN24 on October 8. A number of stations of the International GNSS Service are... read more

This article is tagged with and posted in GNSS News, GPS Modernization

Future Visions from the GNSS Oscar Winners

October 3, 2012By

At the magazine’s annual Leadership Dinner, held during the ION-GNSS Conference, we gave the first GNSS Leadership Awards to four individuals for their respective work in the four fields of satellites, signals, services, and products. We asked each recipient to give us a vision of the future: upcoming work, whether that’s something they plan to undertake or they think someone... read more

GPS IIF Launch Set for Thursday

October 1, 2012By
Delta IV_GPS-IIF-03 Lift and Mate

Lift-off is set for 8:10 a.m. EDT (1210 GMT) Thursday for a GPS IIF satellite, reports Spaceflight Now. GPS IIF-3 will replace an aging 19-year-old craft in plane A, slot 1, part of the program to incrementally upgrade the GPS constellation with greater accuracy, better jam-resistance, and a new civilian aviation signal, all of which are features of the Boeing-build... read more

This article is tagged with and posted in GNSS News, GPS Modernization

Twin Galileo Satellites Fueled and Ready for Launch

October 1, 2012By
Galileo's fit-check with dispenser (credit: ESA).

A pair of Galileo satellites are now fully fueled and mated together atop the upper stage that will haul them most of the way up to their final orbit. The launch is planned for the evening of October 12, reports the European Space Agency. Technicians donned protective suits to fill the two satellites’ tanks with hydrazine fuel, used to maintain... read more

This article is tagged with and posted in Galileo, GNSS News

New BeiDou-2/Compass Satellites Begin Transmissions

October 1, 2012By

News courtesy of CANSPACE Listserv.   The two BeiDou-2/Compass satellites launched on 18 September are now  in their circular medium Earth orbits and have started transmitting navigation signals. Several stations participating in the International GNSS Service’s Multi-GNSS Experiment as well as some in the Cooperative Network for GNSS Observation started tracking the satellites on 26 September. From NORAD/JSpOC, we have... read more

This article is tagged with and posted in BeiDou/Compass, GNSS News

Letter to the Editor: Using One Part of GPS, Ignoring Another

October 1, 2012By

The article “Drone Hack” in the August issue of GPS World and Todd Humphreys’ testimony before a House Subcommittee overseeing the Department of Homeland Security cited results of a spoofing experiment Humphreys conducted with University of Texas colleagues, demonstrating that a drone helicopter, navigating principally on the civil GPS signal, could have its vertical channel spoofed, causing it to descend.... read more

This article is tagged with and posted in Aviation & Space, From the Editor, GNSS Opinions, Government Opinions