Measurement of Localizer Signal Interferences from Hangars in Airport

Abstract

This paper presents the measurement results of a localizer (LOC) experiment in Sendai Airport, a midsized airport in Japan. Multipaths caused by obstacles such as hangars cause interferences with LOC signals. Predicting these signal interferences is crucial from an airport safety perspective. Although many studies related to ILS signal interferences have been already reported so far and a few simulators have been released, Japan faces some uniquely difficult situations. Accordingly, we are now developing a numerical algorithm that handles the signal environment in Japan. We show the measurement results from a real airport, in which multipaths caused by buildings were detected. Our result reveals the behavior of LOC signals at airport and is useful for developing our new numerical algorithm.