Plasma drift estimates from the dynasonde: comparison with EISCAT measurements, Ann
Abstract. Modern ionosondes make almost simultaneous measurements of the time rate of change of phase path in di€erent directions and at di€erent 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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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1998
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.7717 http://hal.archives-ouvertes.fr/docs/00/31/64/41/PDF/angeo-16-1138-1998.pdf |
| Summary: | Abstract. Modern ionosondes make almost simultaneous measurements of the time rate of change of phase path in di€erent directions and at di€erent 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 de®ned 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 Tromsù Dynasonde, employing standard operating modes, gives a reliable indication of overall convection patterns during quiet to moderately active conditions. Key words. Auroral ionosphere á Plasma convection á Instruments and techniques 1 |
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