AO-0321 — Enhanced Arrival Procedures using Adaptive Increased Glide Slope (A-IGS)

Enhanced arrival procedures using Adaptive Increased Glide Slope (A-IGS) will allow inbound aircraft to reduce noise footprint (environmental benefit) while optimizing, thanks to an on-board feature, the vertical flight profile. The use of A-IGS aims at flying a more suitable glide slope that the aircraft is able to fly naturally according to its state (weight and landing configuration chosen by pilots), considering the external environment, i.e. the destination airfield weather (wind, temperature, pressure).
The A-IGS function can be activated as soon as a gain of 0.1° (steeper) can be achieved in comparison with the slope of the published procedure. In practice, the A-IGS function aims at targeting gains which will depend on the tuning of the function (up to 3.5°).
The expected benefits will particularly show in the following cases: light aircraft, high air density, headwind situation. From an implementation perspective, the A-IGS glide slope is based on a published procedure whose final glide slope is slightly increased at on-board system level.