Plasma drift estimates from the Dynasonde: comparison with EISCAT measurements
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 pl...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
1998-10-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/16/1138/1998/angeo-16-1138-1998.pdf |
| Summary: | 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 <i>F</i>-region drift velocity is in good agreement with
EISCAT, despite data loss during intervals of 'blanketing' by intense <i>E</i>-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.<br><br><b>Key words. </b>Auroral ionosphere · Plasma convection ·
Instruments and techniques</p> |
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| ISSN: | 0992-7689 1432-0576 |