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1.
Appl Opt ; 44(33): 7218-31, 2005 Nov 20.
Artigo em Inglês | MEDLINE | ID: mdl-16318195

RESUMO

SCISAT-1, also known as the Atmospheric Chemistry Experiment, is a satellite mission for remote sensing of the Earth's atmosphere, launched on 12 August 2003. The primary instrument on the satellite is a 0.02 cm(-1) resolution Fourier-transform spectrometer operating in the mid-IR (750-4400 cm(-1)). We describe the approach developed for the retrieval of atmospheric temperature and pressure from the troposphere to the lower thermosphere as well as the strategy for the retrievals of volume-mixing ratio profiles of atmospheric species.


Assuntos
Poluentes Atmosféricos/análise , Algoritmos , Atmosfera/análise , Monitoramento Ambiental/métodos , Armazenamento e Recuperação da Informação/métodos , Espectroscopia de Infravermelho com Transformada de Fourier/métodos , Pressão Atmosférica , Astronave , Temperatura
2.
Appl Opt ; 41(33): 6968-79, 2002 Nov 20.
Artigo em Inglês | MEDLINE | ID: mdl-12463241

RESUMO

Version 3 of the Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment data set for some 30 trace and minor gas profiles is available. From the IR solar-absorption spectra measured during four Space Shuttle missions (in 1985, 1992, 1993, and 1994), profiles from more than 350 occultations were retrieved from the upper troposphere to the lower mesosphere. Previous results were unreliable for tropospheric retrievals, but with a new global-fitting algorithm profiles are reliably returned down to altitudes as low as 6.5 km (clouds permitting) and include notably improved retrievals of H2O, CO, and other species. Results for stratospheric water are more consistent across the ATMOS spectral filters and do not indicate a net consumption of H2 in the upper stratosphere. A new sulfuric-acid aerosol product is described. An overview of ATMOS Version 3 processing is presented with a discussion of estimated uncertainties. Differences between these Version 3 and previously reported Version 2 ATMOS results are discussed. Retrievals are available at http://atmos.jpl.nasa.gov/atmos.

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