Plasma drift estimates from the Dynasonde: comparison with EISCAT measurements

Details Plasma drift estimates from the Dynasonde: comparison with EISCAT measurements Plasma drift estimates from the Dynasonde: comparison with EISCAT measurements

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998angeo..16.1138s&link_type=abstract

Annales Geophysicae, vol. 16, Issue 10, pp.1138-1143

Computer Science

Sound

6

Scientific paper

Modern ionosondes make almost simultaneous measurements of the time rate of change of phase path in different directions and at different heights. By combining these `Doppler' measurements and angles of arrival of many such radar echoes it is possible to derive reliable estimates of plasma drift velocity for a defined scattering volume. Results from both multifrequency and kinesonde-mode soundings at 3-min resolution show that the Dynasonde-derived F-region drift velocity is in good agreement with EISCAT, despite data loss during intervals of `blanketing' by intense E-region ionisation. It is clear that the Tromsø Dynasonde, employing standard operating modes, gives a reliable indication of overall convection patterns during quiet to moderately active conditions.

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