Fig. 7From: Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N)EISCAT and photometer results for October 11, 2002; the same as Fig. 2 except for the period from 18:00 UT on October 11 to 02:00 UT on October 12, 2002Back to article page