Fig. 1
From: Capability of airline jets as an observation platform for noctilucent clouds at middle latitudes
a Typical NLC image taken during flight NH105 at 12:45 UTC on Jul 8, 2020, over the northern Pacific Ocean. b Same image as (a), but with the horizontal coordinates embedded. The horizontal (vertical) lines show the elevation (azimuth) angle in 30° intervals. The notation “N” on the vertical line in the center of the image represents the geographical north. The area with NLC features is indicated by a red dotted line. The white dotted lines show the scattering angle. c Image projected onto geographical map by assuming an NLC altitude of 85 km. The plus symbol indicates the location of the jet during the observation