satellite technology - Articles and news items
Issue 5 2012 • 3 October 2012 • Greg Dunstone, ADS-B Programme Manager, Airservices Australia
Airservices Australia is continuing the roll-out of Automatic Dependant Surveillance Broadcast (ADS-B) technology – a satellite-based technology enabling aircraft to be accurately tracked by air traffic controllers and other pilots without the need for conventional radar.Responsible for providing air traffic sur - veillance services for Australia’s 56 million square kilometres of airspace, Airservices Australia has been a world leader in the development and implementation of ADS-B technology. Currently, Australia’s ADS-B network is supported by 29 duplicated ground stations nationwide, plus 14 ADS-B capable multilateration sites in Tasmania and 16 sites in the Sydney basin.These are now delivering continuous surveillance of aircraft operations high level airspace across western, central and northern Australia where radar coverage does not currently exist. A further 14 ground stations are being considered to support the needs of airlines, regional and general aviation.
Issue 5 2012 • 3 October 2012 • Stefan Naerlich, Head of Navigation Services, Deutsche Flugsicherung GmbH and Hans-Jochen Kreher, Head of Satellite Navigation Department, Deutsche Flugsicherung GmbH
Global Navigation Satellite Systems (GNSS) using ground-based augmentation are considered the future solution for precision approaches at airports. Airlines, Air Navigation Service Providers (ANSPs) and manufacturers have been collaborating on a worldwide scale to expand the technology’s capabilities. EUROCONTROL’s SESAR and the FAA’s NextGen programmes are working towards replacing Instrument Landing Systems (ILS) with groundbased augmentation systems (GBAS).According to a market intelligence report conducted by the business media provider ATC Global, GBAS may provide considerable cost-savings. What’s more: GBAS has a high potential for maximising capacity at airports and allows flexible operational use. The German ANSP, Deutsche Flugsicherung (DFS), was the first in the world to operate GBAS for Category I precision approaches in regular operations at an airport. DFS plans to set up a GBAS trial installation for Category II and III operations by 2013/2014.The system boosts the accuracy and integrity of GPS by transmitting corrections to aircraft via a Very High Frequency (VHF) radio data link from a transmitter on the ground. It focuses on the airport area covering approximately a 40km radius. For an airport, even with multiple runways, only one ground station, comprising four GPS antennas, a computer and a VHF transmitter, is necessary.