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A comparison of CADI‐inferred F region plasma convection and DMSP ion drift above Resolute Bay
Author(s) -
Koustov A. V.,
MacDougall J. W.,
Kadochnikov G. E.
Publication year - 2007
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2007rs003706
Subject(s) - ionosonde , plasma , convection , physics , f region , ion , geodesy , geology , ionosphere , atmospheric sciences , geophysics , meteorology , quantum mechanics , electron density
CADI ionosonde estimates of the F region plasma convection over Resolute Bay (NWT, Canada, MLAT = 83.5°) are compared with nearly simultaneous ion drift measurements on board DMSP satellites passing in the vicinity of the station. First, CADI vectors are projected onto the cross‐track directions of DMSPs for 141 events and compared with ion drifts measured by DMSPs in these directions. The best linear fit line is found to have a slope of 0.75 and a shift of −13 m/s indicating good correspondence between the instruments with CADI showing minor underestimation. Then, a fully two‐dimensional comparison is performed by considering (1) magnitudes and azimuths and (2) eastward and northward components of the CADI and DMSP vectors. Reasonable agreement is shown as well. For both comparisons, the data spread is small; the correlation coefficients are of the order of 0.7–0.8. The strongest differences between the instruments were found to occur for the periods with spotty enhancement of the plasma flow detected by one or both instruments.