Availability of dataThe MSF Spectroscopic Data are held at the BADC, and can be viewed or downloaded from the data webpage.The data held covers the following areas:Water vapour line parametersMolecular oxygen absorption cross-sectionsMolecular oxygen/nitrogen absorption cross-sectionsHydrofluorocarbon (HFC) infrared absorption cross-sectionsPerfluorocarbon (PFC) infrared absorption cross-sectionsComputer softwareOther NERC-funded MSF data will be made available through the BADC shortly.