Plasma drift estimates from the Dynasonde: comparison with EISCAT measurements

International audience 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 relia...

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Bibliographic Details
Main Authors: Sedgemore, K. J. F., Wright, J. W., Williams, P. J. S., Jones, G. O. L., Rietveld, M. T.
Other Authors: Prifysgol Cymru Aberystwyth, Ceredigion, British Antarctic Survey (BAS), Natural Environment Research Council (NERC), EISCAT Scientific Association
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 1998
Subjects:
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Tromsø
EISCAT
Online Access:https://hal.science/hal-00316441
https://hal.science/hal-00316441/document
https://hal.science/hal-00316441/file/angeo-16-1138-1998.pdf
Description
Summary:International audience 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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