Space Weather in the ITM: The May-June 2003 Storm and NASA TIMED/GUVI Observations and TIMEGCM Model Results

Details Space Weather in the ITM: The May-June 2003 Storm and NASA TIMED/GUVI Observations and TIMEGCM Model Results Space Weather in the ITM: The May-June 2003 Storm and NASA TIMED/GUVI Observations and TIMEGCM Model Results

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa31b..06p&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SA31B-06

Physics

0310 Airglow And Aurora, 0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition, 2407 Auroral Ionosphere (2704), 2439 Ionospheric Irregularities

Scientific paper

The NASA TIMED mission samples all local solar times every 60 days. As such the coverage of any particular geophysical event could be at any local solar time. The May-June 2003 storm occurred when TIMED was in a near a 10AM LST at the ascending node when the storm began and precessed towards 8AM LST by the end of the storm. The Global Ultraviolet Imager (GUVI) on TIMED obtains images at 5 individual wavelength intervals simultaneously. From the TIMED vantage point at 625 km the instrument must scan from horizon to horizon ( about 120 deg) to form an image. The integration period for any pixel is about 68 msec - this gives us an instantaneous picture of the auroral features. The May-June 2003 event was notable for the magnitude of the high latitude energy inputs - we see more than 100 ergs/cm2 at times in the GUVI images. We also report the observations of the southern hemisphere inputs. GUVI is able to track the response of the thermosphere to this energy input. We see large changes in the O/N2 ratio in the dayside images. We also note significant changes in the nightside electron density profiles.

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