Incoherent scatter measurements in the F1-region

Details Incoherent scatter measurements in the F1-region Incoherent scatter measurements in the F1-region

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jatp...48..857l&link_type=abstract

(EISCAT Scientific Association, International EISCAT Workshop, 2nd, Aberystwyth, Wales, Sept. 9-12, 1985) Journal of Atmospheric

Computer Science

Sound

5

Eiscat Radar System (Europe), F Region, Incoherent Scattering, Ionospheric Sounding, Atmospheric Composition, Correlators, Electron Energy, Ion Temperature, Ionospheric Electron Density

Scientific paper

In the F1-region, temperature and ion composition measurements at EISCAT are usually obtained with a transmitted pulse of 360 microsecs, corresponding to a diffusive volume much larger than the ionospheric scale height. A special correlator program has been used to estimate the errors due to the smearing effect of the diffusive volume. It is shown that these errors can be as large as 50 percent in electron temperature and 20 percent in ion temperature and that they depend on electron density gradients in the diffusive volume. From ion composition results, it is deduced that the transition altitude between molecular ions and oxygen ions is correctly estimated when using a 360-microsec pulse, and that a diffusive volume of the order of + or - 25 km would be good for obtaining correct composition values above 200 km altitude.

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