References of "Esposito, L.W"
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See detailSaturn Auroral Images and Movies from Cassini UVIS
Pryor, Wayne; Esposito, L.W.; Stewart, A.I.F. et al

Conference (2009)

Cassini’s Ultraviolet Imaging Spectrograph (UVIS) has completed five <br />years of study of Saturn’s atmosphere and auroras. Two long slit spectral channels are <br />used to obtain EUV data from 56.3 ... [more ▼]

Cassini’s Ultraviolet Imaging Spectrograph (UVIS) has completed five <br />years of study of Saturn’s atmosphere and auroras. Two long slit spectral channels are <br />used to obtain EUV data from 56.3-118.2 nm and FUV data from 111.5-191.3 nm. 64 <br />spatial pixels along each slit are combined with slit motion to construct spectral images of <br />Saturn. Auroral emissions are seen from electron-excited molecular and atomic hydrogen. <br />In 2008-2009 UVIS obtained data with the spacecraft well out of Saturn’s ring plane, <br />permitting UVIS to obtain a number of short movies of the rotating auroral structures. <br />In some movies a cusp-like feature is present near noon inside the oval. One movie from <br />2008 day 201 shows parallel linear features on the day side almost at right angles to <br />the main auroral oval that appear, then lengthen, separate in the middle, and then fade <br />away. The same movie also shows one bright "polar flare" inside the oval. A few of <br />the most recent images were obtained at sufficiently close range that 2 spacecraft slews <br />were needed to completely cover the oval. These images provide almost 100 pixels of <br />information across the oval and clearly show multiple arcs of emission on the main oval <br />and scattered emissions inside the oval. We will discuss these features, their locations, and <br />possible interpretations. We also report on a search for an Enceladus auroral footprint <br />on Saturn. [less ▲]

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