The Ground-Based Augmentation System (GBAS) provided by TESBL Aerospace is a safety-critical NAVAIDS system that augments the GPS approach and landing. The application of GBAS to precision approach is described as the GBAS Landing System or GLS.

Ground Based Augmentation System (GBAS) is one which provides differential corrections and integrity monitoring of Global Navigation Satellite Systems (Global Navigation Satellite System) data using as input data either three or four GNSS satellite signals received at three of four antennae

GBAS is used primarily used to facilitate GNSS-based precision approaches which are more flexible in design than is possible with ILS. Whilst the main goal of GBAS is to provide signal integrity, it also increases signal accuracy, with demonstrated position errors of less than one meter in both the horizontal and vertical plane. 

The GBAS is expected to support all-weather Operations at CAT-Ⅰ/Ⅱ/Ⅲ. GBAS CAT-Ⅰ operation is a first step towards the more critical operations of CAT-Ⅱ/Ⅲ precision approach and landing.


  • Currently Category I GLS approaches using GPS as the GNSS source have regulatory approval and similar approval for Category II, III and Category IV GLS approaches is anticipated.
  • Flexible approach path reducing flying time, fuel consumption, CO2, etc.
  • Supporting all aircraft operations, surface movement, departure, approach, and landing within the GBAS coverage
  • One GBAS Ground Station supports the aircraft approach and landing to multiple runways ends It reduces installation and maintenance cost and installation site area.


  • Compliant with International Standard ICAO Annex 10 SARPs
  • Adaptability for any site conditions (including ionosphere, troposphere, multi-path)
  • Lightning protection by optical fiber lines for terrestrial networking
  • Anomalous-signal detection technique by high skill in data-mining technology
  • High-speed processor for Real-Time processing of GPS signal