Arinc has flight tested a new differential-GPS precision approach and landing system designed to withstand electronic jamming. Conducted on April 5 at Holloman Air Force Base in New Mexico in an Air Force C-12J (the military version of the Beech 1900C), the tests evaluated the performance of Arinc’s developmental local-area differential GPS (LDGPS) landing aid.
Global Positioning System
In an effort to streamline its GPS/navcom product line, Garmin will rename the CNX80 navigator the GNS 480, according to a spokesman. The new designation positions the panel-mount unit between Garmin’s GNS 430 and GNS 530 products, more than 41,000 of which are flying in various GA aircraft around the world.
Universal Avionics plans to announce FAA certification of the first TSO’d WAAS-qualified FMS for installation on Part 23 and 25 aircraft at a press conference today at
2 p.m. The new Universal W series FMS allows operators to use GPS as a primary means of navigation and to fly WAAS/LPV IFR approaches. The W series FMS is certified to TSO C146b, Class Gamma-3, according to Universal Avionics.
The FAA’s decision last month to award ITT Corp. a $1.8 billion contract (including options) to develop and deploy automatic dependent surveillance-broadcast (ADS-B) technology sets in motion a major NextGen ATC project. But it will take years for the full benefits to be realized.
A study commissioned by the NGATS Institute on behalf of the FAA’s JPDO and prepared by the advanced engineering and sciences division of ITT determined that eLoran (for enhanced) has “the highest overall preference rating…particularly in the U.S.” as a backup for satnav receivers in the event of failure or interference.
This summer a Eurocopter EC 155 all-weather demonstrator performed satellite-guided precision approach tests in Lausanne, Switzerland, as part of a research program aimed at developing approach and departure IFR procedures suited to helicopters using the European geostationary navigation overlay service (egnos) Skyguide, the Swiss air navigation service provider, coordinated the program. Swiss medical air rescue agency Rega was also involved.
The DOD’s Navstar GPS reached a new performance level this year, with 30 satellites in orbit versus its minimum required civil complement of 24. Four more satellites add signal coverage and reduce the number of occasional “holes,” or gaps where fix geometry can sometimes fall below navigation standards.
The U.S. Air Force last month reiterated its intention to choose a single contractor for a new constellation of global positioning satellites known as GPS III. Teams led by Lockheed Martin and Boeing are competing for the contract to launch eight Block A GPS III satellites by 2013. The Air Force invited bids last month for these first satellites, the foundation for an enhanced system scheduled to start operating in 2018.
Occasionally, GPS satellites are spread across the sky in configurations that prevent a receiver from calculating a good position fix. When that happens, the unit’s receiver autonomous integrity monitor (RAIM) will generate an alert to the pilot to use an alternative navigation source.
Northrop Grumman delivered the first production LN-120G GPS-aided stellar-inertial navigation system to the U.S. Air Force last month, to begin the update of the service’s 31 RC-135 Rivet Joint signals intelligence aircraft.