Direct in situ measurements of thermospheric temperature

Details Direct in situ measurements of thermospheric temperature Direct in situ measurements of thermospheric temperature

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.4321k&link_type=abstract

Journal of Geophysical Research, vol. 84, Aug. 1, 1979, p. 4321-4327.

Physics

1

Atmospheric Temperature, Neutral Gases, Satellite Observation, Temperature Measurement, Thermosphere, Earth Observations (From Space), Explorer 26 Satellite, Ion Temperature, Mass Spectrometers, Nitrogen, Satellite-Borne Instruments, Statistical Analysis, Vertical Distribution

Scientific paper

The open source neutral mass spectrometer on the Atmosphere Explorer satellites used for direct in situ measurements of the neutral gas temperature by means of the 'fly-through' mode of operation is evaluated. The derived neutral temperature (Tn) is compared with ion temperatures (T1) obtained simultaneously from the on-board retarding potential analyzer for altitudes and conditions where the two temperatures should be equal. A statistical analysis showed consistency between concurrently observed values of Tn and T1, also shown through profiles depicting their altitude distributions between 150 and 225 km. The overall magnitude of temperatures calculated from the Jacchia (1971) model results in a better representation of the observations than the higher temperatures predicted for this region by the MSIS model (Hedin, 1977), and agreement is also found between observed temperatures and neutral temperatures derived from altitude distributions of N2 particle densities.

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