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 ∼2% error for absorbing channels by use of this method.
© 2003 Optical Society of America
Original Manuscript: July 18, 2002
Revised Manuscript: March 20, 2003
Published: June 20, 2003
Takashi Y. Nakajima, Hiroshi Murakami, Masahiro Hori, Teruyuki Nakajima, Teruo Aoki, Tomohiko Oishi, and Akihiko Tanaka, "Efficient use of an improved radiative transfer code to simulate near-global distributions of satellite-measured radiances," Appl. Opt. 42, 3460-3471 (2003)