Conjugate and Same-Scene Auroral Imagery

Details Conjugate and Same-Scene Auroral Imagery Conjugate and Same-Scene Auroral Imagery

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm42b0598s&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM42B-0598

Physics

2427 Ionosphere/Atmosphere Interactions (0335), 2704 Auroral Phenomena (2407), 2736 Magnetosphere/Ionosphere Interactions, 2740 Magnetospheric Configuration And Dynamics, 2794 Instruments And Techniques

Scientific paper

Conjugate studies of high-latitude geomagnetic activity are central to understanding the global magnetospheric response to external perturbations, i.e. the solar wind, and the role of the ionosphere in modulating and coupling with the magnetosphere. Interhemispheric asymmetries as manifested in auroral emissions have been observed for over 40 years. Unfortunately, the nature of the problem has limited the type and extent of studies that can be performed to either conjugate ground based observations or comparison of space based images with all-sky cameras. Recently Frank and Sigwarth (2002) published results using unique simultaneous images from Polar of the northern and southern aurora, but these are necessarily limited to the nighttime and at oblique angles. However, images made with the cameras from the Polar and IMAGE missions contain simultaneous conjugate images as well as same-scene images of the large-scale aurora under many and varying conditions. This rich data set provides an opportunity to study interhemispheric auroral asymmetries and investigate their occurrence as a function of solar wind conditions and ionospheric parameters such as conductivity. In order to use images of different scenes from each of these cameras, knowledge of their relative response to a common scene is required. To that end, this paper will present preliminary results of comparing images with emphasis on data from the Polar UVI LBH filters and the IMAGE FUV WIC.

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