On 9th of February 2012, the first fully operational GNSS Landing System (GLS) approach to CAT I decision height was made by an Air Berlin flight to Bremen airport in Germany.

Further details can be found thanks to below links:
Air Berlin press new
DFS press release
Eurocontrol press release
Travel daily News press release

Aircraft Remarks / Availability

Airbus
A380 GBAS Option (Available)
A320 Family GBAS Option (Available)
A330 / A340 GBAS Option (2012)
A350 GBAS Option (2014)

Boeing
B727-200 GBAS Fedex STC
B737-NG GBAS Option (Available)
B747-8 GBAS Standard (Available)
B787 GBAS Standard (Available)

When compared to current precision approach systems – GLS is a much more flexible system ready to meet the needs of the air transport community for the future. Initial GLS sytems will emulate the ILS but GLS has capabilities such as curved or segmented approach paths, different glide path angles, off set thresholds, which means that one single GBAS will be able to meet all of the needs for all users at an airport.

When compared to GLS, ILS has one significant advantage, ILS is already installed at most airports that require a precision approach and all aircraft are already equipped. In order to replace ILS any new system must be able to offer significant advantages.

One GBAS – Multiple approaches

One single GBAS will have the capability to provide up to 48 approach procedures. This means that one GBAS will be able to provide precision approach capability to all runway ends at an airport.

Flexible Siting requirements

The GBAS GPS reference receivers can be placed at an optimal location to avoid any possibility of multi-path interference. Siting is not referenced to a runway and so there will be no restrictions on aircraft movements

No need to protect runway ends

Impoved Accuracy of Positioning Service

Use of differential GPS corrections in the coverage area will improve the accuracy of Navigation error, potentially bringing improved R-NAV (RNP) performance to a greater number of users.

Reduced building restrictions

Construction of new terminals and hangars at many airports are restricted due to possible impact on ILS. Due to the flexible siting requirements of GBAS this will not be an issue, reference receivers can even be installed on the roof of airport buildings.

This site is created to support the International GBAS Working Group.

GNSS Landing Systems (GLS) using Ground Based Augmentation (GBAS) are currently being developed and deployed worldwide to improve air safety and increase airport efficiency.

First aircraft systems are already available and FAA, Germany and Russia have qualified first ground systems to support CAT-I precision approach.

Precision landing Improving safe access in low visibility Extract from Eurocontrol Skyway Magazine

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