Recent theoretical advances in analysis of AIRS/AMSU sounding data

Joel Susskind

doi:10.1117/12.718448

7 May 2007 Recent theoretical advances in analysis of AIRS/AMSU sounding data

Joel Susskind

Proceedings Volume 6565, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XIII; 65651H (2007) https://doi.org/10.1117/12.718448
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

The AIRS Science Team Version 5.0 retrieval algorithm will become operational at the Goddard DAAC in early 2007 in the near real-time analysis of AIRS/AMSU sounding data. This algorithm contains many significant theoretical advances over the AIRS Science Team Version 4.0 retrieval algorithm used previously. Three very significant developments are: 1) the development and implementation of a very accurate Radiative Transfer Algorithm (RTA) which allows for accurate treatment of non-Local Thermodynamic Equilibrium (non-LTE) effects on shortwave sounding channels; 2) the development of methodology to obtain very accurate case by case product error estimates which are in turn used for quality control; and 3) development of an accurate AIRS only cloud clearing and retrieval system. These theoretical improvements taken together enabled a new methodology to be developed which further improves soundings in partially cloudy conditions, without the need for microwave observations in the cloud clearing step as has been done previously. In this methodology, longwave CO₂ channel observations in the spectral region 700 cm^-1 to 750 cm^-1 are used exclusively for cloud clearing purposes, while shortwave CO₂ channels in the spectral region 2195 cm^-1 to 2395 cm^-1 are used for temperature sounding purposes. The new methodology is described briefly and results are shown, including comparison with those using AIRS Version 4, as well as a forecast impact experiment assimilating AIRS Version 5.0 retrieval products in the Goddard GEOS 5 Data Assimilation System.

Citation Download Citation

Joel Susskind "Recent theoretical advances in analysis of AIRS/AMSU sounding data", Proc. SPIE 6565, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XIII, 65651H (7 May 2007); https://doi.org/10.1117/12.718448

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KEYWORDS

Clouds

Error analysis

Adaptive optics

Skin

Algorithm development

Temperature metrology

Algorithms

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