Response of low - Latitude OI 630.0nm Dayglow Emission to geomagnetic disturbances

Physics

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0300 Atmospheric Composition And Structure, 0310 Airglow And Aurora, 0355 Thermosphere: Composition And Chemistry, 0394 Instruments And Techniques

Scientific paper

A new spectrograph for High-resolution optical studies of upper atmospheric dayglow emissions has been developed at Boston University. This instrument is called the High Resolution I)maging {Spectrograph using Echelle grating (HIRISE). HIRISE has been operated from high-, mid- and low-latitude locations in campaign mode to measure the OI dayglow/daytime auroral emissions to understand the interaction between the thermospheric and ionospheric processes. During October - December 2001 HIRISE was operated from a low-latitude location, called Carmen Alto (23.16 S, 70.66 W; 10.2 S magnetic latitude), in Chile. Dayglow emissions from day-to-day show variability in response to the electrodynamical influences indicating the coupled nature of ionosphere-thermosphere interactions. The focus of the present investigation would be on coupling during geomagnetically disturbed conditions. In this context We would report on the relative behavior during disturbed conditions with that of geomagnetically quite conditions. We would also report on the comparison between the red line measurements with those derived using models.

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