title: Atmospheric extinction measurements of a He-Ne laser.
abstract: The extinction of a He-Ne laser in a 300-m long urban path has been measured and correlated to temperature and relative humidity variations. The results are contrasted with the scattering coefficient theoretically calculated for a model of aerosols. The agreement seems to indicate that the values of the extinction are strongly correlated with relative humidity in inhomogeneous urban paths.
authors.forename: M
authors.initials: M
authors.lastname: Bertolotti
authors.forename: M
authors.initials: M
authors.lastname: Carnevale
authors.forename: D
authors.initials: D
authors.lastname: Sette