Fig. 6From: A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)All-sky images taken with a digital camera (Nikon D7200) every 30 s with an exposure time of 8 s between 20:14:39 UT and 20:19:39 UT on October 19, 2017. The field-aligned position, where the photometer was pointed, was indicated by a red plus sign (+)Back to article page