DFS Declares Global Debut of GBAS CAT II Operations at Frankfurt Airport

An A380 lands at Frankfurt Airport in Germany, where DFS is now supporting GBAS CAT II ways and landings. (Image courtesy of DFS)

Airlines that fly to Frankfurt Airport can now use the Floor Centered Augmentation Process (GBAS) deployed there for classification II (CAT II) landings, producing it the world’s initial airport to guidance GBAS CAT II operations, in accordance to DFS, the German air navigation provider supplier (ANSP).

DFS 1st deployed GBAS at Frankfurt in 2014, and airlines have been equipped to use the electronic precision landing technique because then—under superior visibility or CAT I problems. Now, many thanks to an improve made to the GBAS station deployed at Frankfurt by DFS, airlines for the 1st time can use GBAS even in inadequate temperature disorders.

GBAS is a technologies that the Federal Aviation Administration describes as a floor-dependent station that is tasked with correcting the Global Positioning Method (GPS) alerts used by aircraft within the vicinity of an airport to “boost the accuracy of, and offer integrity for, these aircrafts’ GPS navigational position.” The GBAS method deployed in Frankfurt, Honeywell’s SmartPath, supports up to 48 distinctive strategy mixtures to many runways from a one ground station.

In emailed statements supplied to Avionics Worldwide, Olaf Weber, GBAS products supervisor for DFS, stated that the German ANSP shown the feasibility of GLS (GBAS Landing Procedure) ways and landings down to CAT II less than a collaboration with Lufthansa and Airbus as aspect of a Single European Sky ATM Study (SESAR) task known as “Demonstration of Runway Improved Ways Made with Satellite Navigation” (Goals). An enhance produced to the GBAS station authorized DFS to publish the GLS CAT II methods with “3° and 3.2° glideslope,” in accordance to Weber.

The GBAS antenna at Frankfurt Airport. “A good deal of Boeing models are presently geared up and authorized for the GLS CAT II company. Airbus is presently functioning on approval for its aircraft types.” – Olaf Weber, GBAS Product Supervisor, DFS.

GBAS technological innovation is also fewer costly to preserve and operate in contrast to the regular Instrument Landing Devices (ILS) applied at most airports, predominantly mainly because it involves an personal ILS for every single runway. That compares to GBAS which demands a person ground station that capabilities four GPS antennas, a laptop or computer, and a VHS transmitter able of taking care of ways and landings for each individual runway at the airport.

“A important problem for differential GPS units like GBAS is their sensitivity to spatial de-correlation thanks to variation in ionosphere delay among aircraft and the GBAS floor station. As a result, DFS has built-in an [satellite based augmentation system] SBAS receiver to the GBAS floor station,” Weber said. “By incorporating an SBAS receiver to the GBAS ground station, it permits the station to make use of the navigational services EGNOS concerning ionospheric corrections and assures distinct continuity prerequisites. In this way, the station supports CAT II operations dependent on amplified CAT I (GAST C) equipment.”

In get to fly the GBAS landings at Frankfurt or any airport that options GBAS floor stations, an aircraft desires to be equipped with a Multi-Manner Receiver (MMR), which Weber states most new in-generation Boeing versions aspect currently. Still, the quantity of plane effectively geared up to fly GBAS landings at Frankfurt is fairly small.

In accordance to ICAO, some of the primary benefits derived from utilizing GBAS for airlines include things like gasoline price savings, noise reduction, and more versatile flight paths for ways and landings.

“The existing GBAS equipage charge at Frankfurt Airport is about 10 %,” he stated, incorporating that “It is the world’s very first GBAS CAT II service. Airlines, ANSPs and brands have been collaborating on a around the world scale. SESAR and the FAA’s NextGen programmes are performing in the direction of replacing ILS with floor-based augmentation methods.”