The Ground Based Augmentation System (GBAS) is a landing system for aircraft. It is based on a reference station at the airport providing corrections and integrity information for satellite navigation signals. Several of these stations are already installed and in operation at airports throughout the world (including e.g. the airports in Frankfurt, Zurich, Sydney and Newark) and regularly provide precision approach guidance up to CAT-I weather conditions (i.e. with a certain minimum visibility). Current operational systems provide corrections and integrity parameters only for the GPS constellations and navigation signals on one frequency.
Within the project GBAS Guided Precision Departures (GUIDE) the development towards a dual-frequency and multi constellation system and its use for guided precision departures is studied. The use of new satellite navigation signals (e.g. from the European Galileo constellation) makes GBAS significantly more robust against external disturbances caused, e.g. by ionospheric or tropospheric effects that regularly occur in equatorial regions. In that way it is possible to develop and standardize a globally usable system.
On the operational side, procedures are developed to guide aircraft along predefined departure routes. They could be transmitted by the GBAS in a similar way as it currently broadcasts approach tracks. In that way, a number of operational restrictions can be lifted in order to increase capacity of a departure runway and limit delays while maintaining the very high level of safety.
Using only a single means of navigation for approach guidance, departure guidance and, potentially also for ground guidance, bears the potential to minimize standardization, integration and certification effort. At the same time this technology enables advanced arrival and departure routes that can minimize noise and fuel consumption significantly.
October 2017 – September 2020
Institute of Flight Guidance, DLR e. V.
Institute of Flight Systems, DLR e. V.
Flight Experiments facility, DLR e. V.