A study on the possibility to deduce the 2D distribution of the auroral electron precipitation from multi wavelength optical measurements with auroral imagers

Axelsson, Katarina (author): Luleå tekniska universitet,Institutionen för system- och rymdteknik

Sergienko, T. (author): Swedish Institute of Space Physics / Institutet för rymdfysik

Sandahl, Ingrid (author)

Brändström, U. (author): Swedish Institute of Space Physics / Institutet för rymdfysik

(creator_code:org_t)

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Abstract Subject headings

The intensity ratios of auroral emissions at different wavelengths are widely used for reconstruction of auroral electron parameters. This method works quite well if the measurements of the auroral emissions are conducted in the magnetic zenith direction. In this study we want to investigate the possibility to use the intensity ratio method in the case where the observations are made in a direction not parallel to the magnetic field. In particular, we want to check the possibility of using auroral data for deducing the 2D distribution of the auroral electron precipitation. We use ALIS multi-station measurements of the auroral red and green line emissions (6300 Å and 5577 Å) to get data in zenith and non-zenith directions. We also take into account that the red line emission peak and the green line emission peak are at different altitudes. The results of this investigation show we can obtain reliable results for angles up to 35º away from magnetic zenith.

By the author/editor: Axelsson, Katari ...; Sergienko, T.; Sandahl, Ingrid; Brändström, U.

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Aerospace Engine ...

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