FTIR hydrogen cyanide (HCN) groundbased remote sensing at Porto Velho from instrument BIRA.IASB004

FTIR hydrogen cyanide (HCN) total columns and low vertical resolution profile data at Porto Velho (Brazil). Details on the FTIR retrieval technique can be found in a paper describing our Reunion Island data (https://doi.org/10.5194/acp-12-10367-2012). The retrieval parameters used in the present HCN time-series at Porto Velho are following this latter study. Data users are kindly invited to collaborate to ensure a proper use of the FTIR data (e.g. appropriate use of the averaging kernels). The guidelines in the GEOMS documentation should be used to select the latest version of a data file in case files have overlapping dates.