Simultaneous Observations of Conjugate Northern and Southern Auroras from a Single Camera.

Details Simultaneous Observations of Conjugate Northern and Southern Auroras from a Single Camera. Simultaneous Observations of Conjugate Northern and Southern Auroras from a Single Camera.

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsm23a..04s&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SM23A-04

Physics

2407 Auroral Ionosphere (2704), 2409 Current Systems (2708), 2431 Ionosphere/Magnetosphere Interactions (2736), 2455 Particle Precipitation, 2788 Storms And Substorms

Scientific paper

Most studies of the solar wind-magnetosphere-ionosphere system assume that the northern and southern auroral ovals are symmetric. However, evidence has been steadily accumulating for interhemispheric differences in the nature of the northern and southern auroras at magnetically conjugate locations. From late September to early November of the years 2000-2003, the apogee for the Polar spacecraft was located at ~9 RE near the equator with a local time in the pre-midnight magnetotail. From this vantage point, the far ultraviolet sensitive Earth Camera of the Polar/Visible Imaging System (Polar/VIS) acquired simultaneously (in a single image frame) observations of magnetically conjugate northern and southern auroral locations for most of the nighttime sector. The image frame cadence was 54 s. These conjugate observations have the advantage of being acquired from a similar perspective with a single camera, a single bandpass sensitivity, and exactly simultaneous timing. The altitude of Polar was sufficiently high to allow determination of the latitudinal distribution of auroral luminosities at a spatial resolution of ~150 to 200 km. The timings, motions, and auroral locations of several events will be presented.

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