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Ann. Geophys., 14, 1403-1412, 1996
www.ann-geophys.net/14/1403/1996/
© European Geosciences Union 1996
A comparison of EISCAT and Dynasonde measurements of the auroral ionosphere
K. J. F. Sedgemore1, P. J. S. Williams1, G. O. L. Jones2, and J. W. Wright1
1Adran Ffiseg, Prifysgol Cymru Aberystwyth, Ceredigion SY23 3BZ, Wales
2British Antarctic Survey, NERC, Cambridge CB3 0ET, England
Abstract. Incoherent-scatter radar and ionospheric
sounding are powerful and complementary techniques in the study of the Earth's
ionosphere. The work presented here involves the use of the Tromsø Dynasonde as
a correlative diagnostic with the EISCAT incoherent-scatter radar. A comparison
of electron-density profiles shows how a Dynasonde can be used to calibrate an
incoherent-scatter radar and to monitor changes in the system. Skymaps of the
direction of Dynasonde echoes are compared with EISCAT-derived density profiles
to illustrate how a Dynasonde can be used to measure the drift velocity of
auroral features. Vector velocities fitted to Dynasonde echoes are compared with
EISCAT-derived plasma velocities. The results show good agreement when the data
are taken during quiet to moderately active conditions and averaged over time
scales of 30 min or more.
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