G. Bernhard and C. Booth (Biospherical Instr.) – Measurements of UV spectroradiometer irradiance, with an SUV-100 and GUV-511, initiated in November 1988. Operations ceased at the end of 2008 due to funding termination.
M. Yela, O. Puentedura and M. Navarro (INTA) – Zenith measurements of column NO2 since 1994 with a grating scanning monochromator. Since 2015, MAXDOAS system has been operating. Scanning system will continue to take measurements until 2020 in order to overlap with those by the MAXDOAS systems. In 2017 joined NDACC. Data from 1994 to 2016 not yet archived.
INTA: Instituto Nacional de Technica Aerospacial (Spain)
MAXDOAS: Multi Axis Differential Optical Absorption Spectroscopy