Other
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35..475o&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 35, April 1987, p. 475-482.
Other
9
Magnetic Storms, Polar Substorms, Red Arcs, Thermosphere, Atmospheric Heating, Atmospheric Temperature, Fabry-Perot Interferometers, Magnetic Signatures, Midlatitude Atmosphere, New York, Wind Velocity Measurement
Scientific paper
On the night of September 26/27, 1979 (EST), photometric observations of a weak but well defined SAR-arc were made from two ground stations; one at Albany, NY and another at Plattsburgh, NY. Interferometric measurements of the thermospheric temperatures and winds were also made from Albany, NY during this night. The optical data were studied in conjunction with the magnetograms obtained concurrently from stations over Canada. The results are that: (1) triangulation from the two stations showed that the height of the arc was in the range of 370-460 km, with an average value of 401 km, and that the arc moved rapidly both equatorward and downward during the period of steep increase of its intensity; (2) magnetograms showed a striking coincidence between the onset of the SAR-arc and that of an isolated magnetic substorm, suggesting a physical link between the two phenomena; and (3) measurements of the thermospheric temperatures and winds showed sharp increases in both temperature and equatorward wind velocity approximately 1 h after the onset of an isolated magnetic substorm, indicating a definite thermospheric response to auroral heating associated with the isolated magnetic substorm. Both measured temperatures and winds showed wave-like changes. No specific additional heating within the arc was detected.
Kim Jinyoung Serena
Okano Shinya
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