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Harestua, 60°N, 10°E
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UV/Vis zenith-sky DOAS (Differential Optical Absorption Spectroscopy):
Morning and evening twilight observations of ozone, NO2, OClO and BrO. Existing time series extend back to 1994.
Picture courtesy: C. Hermans, J.C.Lambert (BIRA-IASB)
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