An Antarctic no density profile deduced from the gamma band airglow |
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Authors: | N Iwagami T Ogawa |
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Institution: | Geophysics Research Laboratory, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan |
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Abstract: | The nitric oxide density profile between the altitudes 72 and 120 km was obtained by means of the airglow γ(1, 0) band measured with a rocket-borne radiometer flown at Syowa Station (69°S, 40°E). The NO density was found to have two peaks with a value of 1.5× 108cm?3 at 90 and 110 km, and is much larger than those in the middle and low latitudes. Because of a long lifetime of NO in the mesosphere, the observed NO enhancement may be due to the after-effect of the particle precipitation event which occurred within the half day before, despite no polar disturbance during the rocket flight. |
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