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Argon: A thermometer of the upper atmosphere (1974)

Chandra, S. ; Spencer, N. W.

In: CASI

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Publication Date: 2019-06-27

Description: The exospheric temperatures are derived from Ar, N2, O and He measurements obtained from the Aeros-1 NATE experiment. It is shown that the temperatures derived from Ar and N2 are very close to each other and show very similar seasonal, latitudinal and the day to night variations both under quiet and the geomagnetically disturbed conditions. The temperatures derived from O and He do not usually follow this pattern because of their large variabilities in the lower thermosphere. The differences in the inferred temperatures from these gases are particularly noticeable when the neutral composition data between 220-250 km are used. In this altitude region Ar appears to have some advantage over N2 for the purpose of deriving neutral temperature.

Keywords: GEOPHYSICS

Type: NASA-TM-X-70754 , X-621-74-254

Format: application/pdf

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