Simulation comparison of aircraft landing performance in foggy conditions aided by different UV sensors.
In the atmosphere pointlike sources are surrounded by an aureole due to molecular and aerosol scattering. UV phase functions of haze droplets have a very important forward peak that limits signal angular spreading in relation to the clear atmosphere case where Rayleigh scattering predominates. This specific property can be exploited using solar blind UV source detection as an aircraft landing aid under foggy conditions. Two methods have been used to compute UV light propagation, based on the Monte Carlo technique and a semi-empirical approach. Results obtained after addition of three types of sensor and UV runway light models show that an important improvement in landing conditions during foggy weather could be achieved by use of a solar blind UV intensified CCD camera with two stages of microchannel plates.
Lavigne
Claire
C
Applied and Theoretical Optics Department, The French Aerospace Lab, Chemin de la Hunière, 91761 Palaiseau Cedex, France. claire.lavigne@onera.fr
Durand
Gérard
G
Roblin
Antoine
A