title: Tropospheric CO observed with the NAST-I retrieval methodology, analyses, and first results.
abstract: 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.
authors.affiliation: Science Directorate, NASA Langley Research Center, 21 Langley Boulevard, Hampton, Virginia 23681, USA. daniel.k.zhou@nasa.gov
authors.forename: Daniel K
authors.initials: DK
authors.lastname: Zhou
authors.forename: William L
authors.initials: WL
authors.lastname: Smith
authors.forename: Xu
authors.initials: X
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Allen M
authors.initials: AM
authors.lastname: Larar
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Mango