Recent Validation Comparisons for the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS)

The Atmospheric Chemistry Experiment (ACE) is a Canadian satellite mission for remote sensing of the Earth's atmosphere now in its eighteenth year of operations. These composition measurements contribute to our understanding of ozone recovery, climate change and pollutant emissions. The primary instrument for ACE is a high-resolution (0.02 cm-1) Fourier Transform Spectrometer (ACE-FTS) operating between 750 and 4400 cm-1 using the solar occultation measurement technique. The ACE-FTS data set provides altitude profiles of temperature, pressure, and volume mixing ratios of more than 40 atmospheric trace gas species and their subsidiary isotopologues. This paper will report on ACE-FTS validation results for the current version 4.1/4.2 data set and the upcoming version 5.