title: Semianalytic pulsed coherent laser radar equation for coaxial and apertured systems using nearest Gaussian approximation.
abstract: We present a semianalytic pulsed coherent laser radar (CLR) equation for coaxial and apertured systems. It combines the conventional CLR equation, numerical Fresnel integration (NFI), and nearest Gaussian approximation, using correction factors that correspond to beam truncation. The range dependence of the signal-to-noise ratio obtained by this semianalytic equation was found to agree well with the precise NFI solution for not only the focal range, but also the near-field range. Furthermore, the optimum beam truncation condition depending on the atmospheric refractive index structure constant is shown. The derived equation is useful for precisely predicting the CLR performance simply by its semianalytic expression.
authors.affiliation: Information Technology R&D Center, Mitsubishi Electric Corporation, Japan. Kameyama.Shumpei@dn.MitsubishiElectric.co.jp
authors.forename: Shumpei
authors.initials: S
authors.lastname: Kameyama
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Ando
authors.forename: Kimio
authors.initials: K
authors.lastname: Asaka
authors.forename: Yoshihito
authors.initials: Y
authors.lastname: Hirano