Abstract:

At present,more and more aerodromes are with configurations of the two-runways in China,and among them some two-runways have obvious elevation differences,while the current standards like Annex 14 of the International Civil Aviation Convention and procedures fot Air Navigation Services- Aircraft Operation (PANSOPS)don't give detailed provision on inner horizontal for above circumstance,causing some confusions and difficulties for such aerodromes on the planning and obstacle management. Based on the comprehensive consideration of aerodromes flight safety,planning and construction of the surrounding area and aerodromes clearance management inheritance,a methodology is established for determining the inner horizontal obstacle limitation surface for aerodrome of two-runways with altitude difference.

Key words: aerodromes, clearance, inner horizontal surface, runway altitude difference