Other
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa51a0765p&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SA51A-0765
Other
0310 Airglow And Aurora, 0355 Thermosphere: Composition And Chemistry, 0394 Instruments And Techniques
Scientific paper
Except for around 35% of the time when it is night, the Earth is illuminated by either direct sunlight or by scattered sunlight. Ground-based measurements of the thermospheric emissions during these times pose a technical challenge due to the presence of sunlight, which is very bright compared to the optical emissions. This is why ground-based optical aeronomy during daytime has remained one of the least explored areas of upper atmospheric research. With the development of novel ground-based daytime optical techniques in the last decade this area has undergone a renaissance. Of the many emissions, the red line (OI 630.0nm) dayglow has been the focus of several investigations that have been carried out from Indian, American, Arctic, and Antarctic regions. The results obtained so far have a significant impact in understanding the nature of coupling between different regions (e.g., the E- and F- regions at low/equatorial latitudes, ionosphere-thermosphere coupling at all latitudes and magnetosphere-ionosphere-thermosphere coupling at high latitudes). Each of the earlier results indicated the potential use of OI 630.0nm dayglow measurements in advancing our understanding of the Earth's upper atmosphere as a whole. There are many other emissions that need to be measured. There are ways in which one can carry out multiple wavelength measurements. In the presentation we will discuss the direction we need to take in the future to exploit this important area of research to its fullest.
Chakrabarti Sangeeta
Pallamraju Duggirala
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