Originally Posted by
safetypee
Two segment noise abatement approach.
Aircraft would remain high over populated areas, descending at 5-6 deg to intercept a 3 deg GS at 1000 ft for landing.
Never progressed in commercial aviation as engine and airframe noise reduction gave similar benefits. However the idea was used by the space shuttle as a landing flare aid.
BA have carried out two-segment approach trials at Heathrow in the last year or so, using both B777 and A380.