Fig. 10From: EUV signals associated with O+ ions observed from ISS-IMAP/EUVI in the nightside ionosphereSimulated altitudinal profile of the EUV photon flux (in Rayleighs) where the tangent point of the line of sight was set at \(40^{\circ }\) in latitude and 0722 LT on 6 SeptemberBack to article page