ISUAL observations of global distribution of green line airglow
Abstract
ISUAL (Imager of Sprites and Upper Atmospheric Lightning) instrument on board the FORMOSAT-2 satellite has made observations of the upper atmosphere in 2012 every month for three days by using the #4 filter centered at 557.7 nm for the green line airglow. The airglow layers are imaged by a CCD camera and the emission intensities also measured by a six-channel spectral photometer at midnight local time. The CCD results are analyzed to reveal the green line emission in terms of latitude, longitude, height, and daily variations. The global longitudinal distributions show 4-6 peaks in the summer over equatorial regions. Latitudinal data over -35 to +25 degree show emissions weak in equator but higher in midlatitudes. Peaks intensities are high in altitudes (95 km) in equatorial regions and lower (85 km) in midlatitudes. As the measurements go on, we expect to get a full picture of green line emission in the near future.;
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFMSA43B2084N
- Keywords:
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- 0310 ATMOSPHERIC COMPOSITION AND STRUCTURE / Airglow and aurora;
- 0340 ATMOSPHERIC COMPOSITION AND STRUCTURE / Middle atmosphere: composition and chemistry;
- 0342 ATMOSPHERIC COMPOSITION AND STRUCTURE / Middle atmosphere: energy deposition;
- 3394 ATMOSPHERIC PROCESSES / Instruments and techniques