M. Grutter de la Mora and W. Stremme (UNAM) – Measurements performed routinely with a Bruker 120/5HR (0.0035 cm-1) acquired from DLR and upgraded by KIT-IMK in 2011. The instrument was installed in May 2012 at the Altzomoni Observatory, a high altitude station located in Central Mexico at 3,985 masl. Retrievals are performed with PROFFIT.