Fig. 1From: A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)a Schematic diagram of the optical unit of the photometer. b Block diagram of the optical part of the photometer. Unit is in mm. c Schematic diagram of distribution of the dichroic mirrors of the photometer. Penetration and reflection efficiencies of the dichroic mirrors with corresponding wavelength intervals are shownBack to article page