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Fig. 12 | Earth, Planets and Space

Fig. 12

From: 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)

Fig. 12

Comparison of altitude profiles of electron densities; top altitude profiles of electron densities observed by EISCAT (black solid circles with error bars) and the photometric method (red line) at 2054:20 UT (left) and at 2053:00 UT (right) on October 10, 2002. Bottom sky color images at 2054 UT (left) and 2053 UT (right) taken by digital camera on October 10, 2002. White small circles denote the position of the observations (arbitrary size). Red small circle and white rectangle on the left edge are contaminations from artificial light

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