Ground based in situ observations of filter_1pack at East Ruston (GB0090R). These measurements are gathered as a part of the following projects CAMP, EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: scandium in aerosol (mass_concentration_of_scandium_in_dry_aerosol_particles_in _air), titanium in aerosol (mass_concentration_of_titanium_in_dry_aerosol_particles_in _air)