15 September 1993 Effects of satellite spectral resolution and atmospheric water vapor on retrieval of near-ground temperatures
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Abstract
The vertical resolution capabilities of the VISSR atmospheric sounder (VAS) and the proposed GOES high-resolution interferometer sounder (GHIS) were considered with regard to temperatures at and near the ground surface. Simulated retrievals were performed, along with experiments on the sensitivity of radiances to profile perturbations. For a moderately moist atmosphere, ground surface temperature errors of about 1 degree(s)C and low-level air temperature errors of about 3 degree(s)C can occur in VAS retrievals due specifically to vertical resolution limitations and instrument noise. For a drier atmosphere the surface temperature errors tend to be smaller and the low-level air temperature errors tend to be larger. It appears that these vertical-resolution-related retrieval errors can be reduced by a factor of about 70 - 90% by going from VAS to an instrument with performance specifications such as those of GHIS. These results also imply that a high-spectral-resolution instrument can perform significantly better than VAS in the task of estimating cloud top heights and temperatures for low clouds.
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Alan E. Lipton, "Effects of satellite spectral resolution and atmospheric water vapor on retrieval of near-ground temperatures", Proc. SPIE 1934, Passive Infrared Remote Sensing of Clouds and the Atmosphere, (15 September 1993); doi: 10.1117/12.154925; https://doi.org/10.1117/12.154925
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