HR: 1340h
AN: A33A-0148    [Abstracts]
TI: Forward Modeling of HIRDLS Channel Radiances for Operational Retrievals
AU: * Francis, G L
EM: gfrancis@ucar.edu
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Edwards, D P
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Lambert, A
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Halvorson, C M
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Lee-Taylor, J M
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Gille, J C
AF: Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 United States
AB: We describe the radiative transfer modeling developed for the High Resolution Dynamics Limb Sounder (HIRDLS) instrument aboard the NASA EOS-Aura satellite. HIRDLS is a 21-channel radiometer operating in the spectral region between 6 and 18 microns. Situated in a high-inclination orbit which provides global sampling, HIRDLS is designed to rapidly measure limb emission at tangent heights from the troposphere into the mesosphere. Science products will include profiles of temperature and chemical constituents, as well as aerosol estimates, the location of polar stratospheric clouds, and geopotential height gradients. A forward model must accurately and quickly estimate transmittances and channel radiances for use in the operational retrievals. The forward model must take into account the presence of many target and interfering gases, a wide range of atmospheric and radiative states, and requirements on the accuracy and precision of the retrieved science data. We describe techniques developed to address these issues. These collectively define the HIRDLS forward model hierarchy, which provides an effective solution to the requirement for fast and accurate radiative transfer modeling for operational use.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0365 Troposphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting