An Overview Of GBAS

An Overview Of Ground Based Augmentation System

The Air transport is the fastest mode of transport in the world. The emergence of such a transport facility reduced the complexities of international traveling. It has contributed to the growth of many other sectors such as business, health, tourism, media and communication, etc. So the impact of aviation is reflecting on various industries of the world.

Air Traffic Management (ATM) is crucial for flight management (landing and takeoff). Ground-Based Augmentation Systems(GBAS) are used for managing such activities. How GBAS enhances efficiency in Air Traffic Management? Well, this article will provide you insights on the significance of GBAS.

GBAS –The Integrated Air Traffic Management

The system which supports augmentation using terrestrial radio signals is known as Ground-Based Augmentation System (GBAS). GBAS(air traffic managament) includes single or multiple radio transmitters that transmit the information directly to the end user from the ground and ground-based augmentation systems which are commonly composed of one or more accurately surveyed ground stations(remote tower). The system thus the constraints associated with GEO Satellites at high latitudes. If the distance between the station and the plain is shorter, higher will be the accuracy of the signals. It is a localized system that supports signals coming from 23 nautical miles and transmits very high frequency (VHF) band.

GBAS is mainly intended for landing phase real accuracy and integrity of the signal are crucial. Such systems are exceptionally useful when weather condition and visibility of the Airport is not that much good. The benefits of Ground-Based Augmentation System (GBAS) include:

• Over comes the challenges of traditional Instrument Landing System (ILS).

• Meeting the demands of Air Traffic Management in cost effective way.

• Optimizing low visibility operations using Landing Clearance Line.

• Reduced runway occupancy times along with reduced risk of vortex problems.

• An effective mechanism to prevent poor weather quality conditions. It is achieved by supporting reduced spacing on final approach.

• Since the GBAS(indra navia) increases the glide slopes and curved approaches, it leads to low noise concerns in Airport navigation.

• When Ground Based Augmentation System is used in Airports, only one ground station is required in order to service multiple approaches to all runways at an airport.

• Since Ground Based Augmentation Systems primarily addresses busy airports with limitations in capacity, it facilitates efficient arrival paths.

• The customers also benefit from GBAS as it ensures effective flight management and thereby provides them delightful services.


The GBAS ground based augmentation system is developed out of the challenges raised from ILS. The Instrument Landing System (ILS) is deployed since 1960 around Europe for effective landing approach. In that, it only includes a glide slope antenna for vertical guidance and localizer to provide lateral guidance. What made the evolvement of GBAS is the availability of advanced satellite navigation systems. So GBAS was employed to ensure the future challenges of Air Traffic Management. Now with the help of GBAS, the Airport authorities are able to manage Air Traffic Management effectively. It not only reduces the complexities of airport navigation but also ensures safe flight landing. With the system the authorized personals can check whether the runway is vacant, or the signal is good or is it a good time to land in spite of poor weather conditions, etc. even though such systems are confined to Airports, they are indirectly embracing almost every industry of the world by efficient Air traffic management.