Ion-neutral dynamics in the high latitude ionosphere - First results from the INDI experiment

Details Ion-neutral dynamics in the high latitude ionosphere - First results from the INDI experiment Ion-neutral dynamics in the high latitude ionosphere - First results from the INDI experiment

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50..369w&link_type=abstract

(EISCAT Scientific Association, International EISCAT Workshop, 3rd, Bad Lauterberg, Federal Republic of Germany, Mar. 23-27, 198

Physics

23

Incoherent Scatter Radar, Ion Motion, Ionospheric Ion Density, Polar Regions, Eiscat Radar System (Europe), Fabry-Perot Interferometers, Meridional Flow, Oxygen, Thermosphere, Zonal Flow (Meteorology)

Scientific paper

Results are presented from the Ion-Neutral Dynamics Investigation experiment which consisted of a series of joint observations between EISCAT and a Fabry-Perot interferometer (FPI) situated at Kiruna, Sweden. The FPI measured the 630 nm neutral oxygen emission at eight positions on a 30 deg elevation circle, giving a spatial average of the neutral wind field with a time resolution of about 15 min. The radar performed a seven-position, near-meridional scan in a region common to the optical measurements. The neutral wind from the EISCAT data is derived using the simplified ambipolar diffusion and ion energy equation and is then compared with the direct measurements from the FPI. There is good agreement between derived and measured meridional winds, but the zonal wind values differed in magnitude by a factor of 3-5. The meridional wind data is used to derive the ion-neutral collision frequency and comparisons of the measured electron densities with the 630 nm emission intensity are used to study the chemistry of the emission process.

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