Visibility range of LED signaling lights of a runway

Abstract

Results of calculations for the luminous intensity from light emitting diode (LED) lights necessary for reliable visual detection of runway (RW) lights in real operational conditions are presented. The following groups of RW LED lights are considered: approach threshold lights, lights of the last 600 m of the runway, and runway end lights. Threshold levels of detection have been chosen. The effectiveness of RW LED lights is analyzed in different weather conditions during the night, at twilight, and in the daytime, and questions of a stepped adjustment of LED light radiation intensities in accordance with ICAO standards are considered.