Analysis of spectral radiance measurements by IMG on ADEOS

摘要

The Interferometric Monitor for Greenhouse Gases (IMG) uses Fourier transform spectrometry to measure the top of the atmosphere spectral radiance between 3.3 $mu@m and 14 $mu@m in 3 separate bands. It was launched aboard the Japanese ADEOS satellite in August 1996, and has an unapodized spectral resolution of 0.05 cm$+$MIN@1$/. IMG spectral radiance measurements over different geographical spectral resolution of 0.05 cm$+$MIN@1$/. IMG spectral radiance measurements over different geographical regions are compared with standard line-by-line radiative transfer model calculations. CO retrieval and comparison between synthetic spectra calculated by FASCOD3 and IMG observations during the WINter Clouds Experiment are discussed as a case study. Preliminary analysis indicates that the retrieved CO from IMG spectral radiance measurements agrees with in-situ measurements made by the Climate Monitoring and Diagnostics Laboratory of the National Oceanic and Atmospheric Administration at the nearby Park Falls monitoring site.