Consideration of meteorological effects on noise propagation by using the aircraft noise prediction model in JAXA's DREAMS project

摘要

Japan Aerospace Exploration Agency has conducted a research project called DRAEMS. Its main aim was to develop technologies for future air traffic management systems which will enhance safety, efficiency, user convenience, and environmental compatibility of flight operations. One of the research topics examined by the project is noise abatement technology. Its key element is an aircraft noise prediction model which can take into account the effect of meteorological conditions on noise propagation. This paper investigates the ground effect on aircraft noise propagation, focusing on the variation of lateral attenuation due to the meteorological conditions. It is shown that the variations become significantly large under upwind propagation conditions.