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Tropospheric CO observed with the NAST-I retrieval methodology, analyses, and...

Zhou, D. K., W. Smith, Xu Liu, J. Li, A. Larar, and S. A. Mango (2005), Tropospheric CO observed with the NAST-I retrieval methodology, analyses, and first results, Appl. Opt., 44, 3032-3044.

High-resolution infrared spectra from aircraft and space-based observations contain information about tropospheric carbon monoxide (CO) as well as other trace species. A methodology for retrieving tropospheric CO from such remotely sensed spectral data has been developed for the National Polar-Orbiting Operational Environmental Satellite System’s Airborne Sounder Testbed—Interferometer (NAST-I). CO profiles of the troposphere, together with its thermodynamic properties, are determined by use of a three-stage retrieval approach that combines the algorithms of physically based statistical eigenvector regression, simultaneous and iterative matrix inversion, and single-variable error-minimization CO profile matrix inverse retrieval. The NAST-I is collecting data while it is aboard high-altitude aircraft throughout many field campaigns. Detailed retrieval analyses based on the NAST-I instrument system along with retrieval results from several recent field campaigns are presented to demonstrate NAST-I CO retrieval capability.

Research Program: 
Atmospheric Composition