An Evaluation of the LOWTRAN 6 Navy Maritime Aerosol Model Using 8- to 12-Micrometers Sky Radiances.
Research rept. Oct 85-Sep 86,
NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA
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Measurements of infrared 8-12 micrometers sky radiances over the ocean are compared with those calculated by LOWTRAN 6 by means of the Maritime Aerosol Model along with simultaneously measured radiosonde meteorological parameters and atmospheric radon concentrations. For a low wind-speed condition, the measured and calculated radiances agreed within 2 at the optical horizon. However, during moderate wind-speed conditions, the current wind speed component of the aerosol model had to be lowered by factors near 20 in order to produce agreement of the calculated and measured radiances. The adjusted model is then found to agree closely with published results of large particle size distribution measurements in the North Atlantic. Keywords Optical scattering Atmospheric modeling Aerosol size distribution Radiance algorithm Infrared radiance Thermal imaging.
- Atmospheric Physics