Column-averaged dry-air mole fraction of atmospheric methane, version 1.0. CLIMATE APPLICATIONS: Studying atmospheric methane trends and emissions - possibly feeding into IPCC.. OFFICIAL CITATION: Siddans, R.; Knappett, D.; Kerridge, B.; Latter, B.; Waterfall, A.; Hurley, J.; Walker, J. (2016): STFC RAL methane retrievals from IASI on board MetOp-A, version 1.0. Centre for Environmental Data Analysis, 18 March 2016. doi:10.5285/B6A84C73-89F3-48EC-AEE3-592FEF634E9B. http://dx.doi.org/10.5285/B6A84C73-89F3-48EC-AEE3-592FEF634E9B