Ground based in situ observations of chemiluminescence_molybdenum at Capo Granitola (IT0014R). These measurements are gathered as a part of the following projects ACTRIS, GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air), nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air)