Fig. 1From: Estimation of the emission altitude of pulsating aurora using the five-wavelength photometera An image recorded by the EMCCD all-sky camera in Tromsø at 03:02:30 UT on 24 February 2018. The red circle indicates the field-of-view of the five-wavelength photometer. Time-series of auroral emissions at b 427.8 nm, and c 557.7 nm obtained from the five-wavelength photometer for a 1-min interval from 03:02 UT to 03:03 UT on the same dayBack to article page