title: Efficient use of an improved radiative transfer code to simulate near-global distributions of satellite-measured radiances.
abstract: Two new extension modules that give the water-leaving radiance from the ocean and the snow bidirectional reflectance distribution function were implemented in the latest radiative transfer code. In addition, to simulate the near-global distributions of satellite-measured radiances by using the improved radiative transfer code, we tested and applied the look-up table method together with the process-separation technique of the radiative transfer calculation. The computing time was reduced from 1 year to 20 s to simulate one channel, one scene of the Global Imager image by use of an Alpha 21164A-2 (600-MHz) machine. The error analyses showed that the radiances were simulated with less than 1% error for the nonabsorbing visible channels and approximately 2% error for absorbing channels by use of this method.
authors.affiliation: Earth Observation Research Center, National Space Development Agency of Japan, Harumi Island Triton Square, Tokyo, Japan. nakajima@eorc.nasda.go.jp
authors.forename: Takashi Y
authors.initials: TY
authors.lastname: Nakajima
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Murakami
authors.forename: Masahiro
authors.initials: M
authors.lastname: Hori
authors.forename: Teruyuki
authors.initials: T
authors.lastname: Nakajima
authors.forename: Teruo
authors.initials: T
authors.lastname: Aoki
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Oishi
authors.forename: Akihiko
authors.initials: A
authors.lastname: Tanaka