Other
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa31a1949w&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA31A-1949
Other
[0310] Atmospheric Composition And Structure / Airglow And Aurora, [2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2475] Ionosphere / Polar Cap Ionosphere, [3369] Atmospheric Processes / Thermospheric Dynamics
Scientific paper
NASA balloon mission HIWIND (High attitude Interferometer WIND observation) is the first balloon Fabry-Perot interferometer for daytime thermospheric wind measurements. Thermospheric wind is a key parameter for a better understanding of the ionosphere from the polar cap to the equator. Yet, observations of thermospheric winds are very sparse both from the ground and satellites. Ground based Fabry-Perot interferometers are effective in observing the thermospheric winds during the night. It is very hard to measure daytime thermospheric winds from the ground due to the high solar scattering background. There are only a very few satellites are observing thermospheric winds at the moment. To fill in the data gap, NASA Heliophysics GEOSPACE program sponsored the HIWIND balloon borne FPI mission to measure thermospheric winds during day and night. A stratospheric balloon can fly at 40 km altitude, where the solar scattering is three orders of magnitude smaller than that at the sea level. Because of the reduced scatter background, HIWIND is able to observe the thermospheric dayglow (O 630 nm) and to extract thermospheric winds from the signal. The HIWIND balloon flew in June 2011 from Kiruna Sweden to northern Canada and obtained very high quality daytime thermospheric wind data. To better understand the ion neutral interaction, the EISCAT incoherent scatter radar was used to measure ion drift and other ionospheric parameters during the HIWIND flight. The observational results from HIWIND flight and will be presented. The results show that HIWIND is a very effective tool to measure thermospheric winds at any local times.
Haggstrom Ingemar
Wu Qingwen
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