We review the main factors driving the calculation of the tangent height of spaceborne limb measurements: the ray-tracing method, the refractive index model and the assumed atmosphere. We find that commonly used ray tracing and refraction models are very accurate, at least in the mid-infrared. The factor with largest effect in the tangent height calculation is the assumed atmosphere. Using a climatological model in place of the real atmosphere may cause tangent height errors up to ± 200 m. Depending on the adopted retrieval scheme, these errors may have a significant impact on the derived profiles.
Titolo: | Characterization of model errors in the calculation of tangent heights for atmospheric infrared limb measurements |
Autore/i: | RIDOLFI, MARCO; L. Sgheri |
Autore/i Unibo: | |
Anno: | 2014 |
Rivista: | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.5194/amt-7-4117-2014 |
Abstract: | We review the main factors driving the calculation of the tangent height of spaceborne limb measurements: the ray-tracing method, the refractive index model and the assumed atmosphere. We find that commonly used ray tracing and refraction models are very accurate, at least in the mid-infrared. The factor with largest effect in the tangent height calculation is the assumed atmosphere. Using a climatological model in place of the real atmosphere may cause tangent height errors up to ± 200 m. Depending on the adopted retrieval scheme, these errors may have a significant impact on the derived profiles. |
Data stato definitivo: | 2015-12-09T11:51:54Z |
Appare nelle tipologie: | 1.01 Articolo in rivista |
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