Ground based in situ observations of nitrogen_monoxide at Moerkerke (BE0011R) using chemiluminescence_photometer. These measurements are gathered as a part of the following projects CAMP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air)