Characteristics of tropopause folds over Arctic latitudes have been studied using VHF radar measurements supplemented by balloon measurements. The variation of the radar parameters during the passage of tropopause folds is discussed in detail. To our knowledge, these observations constitute the first spaced antenna (SA) radar measurements during the passage of tropopause folds. This allows us to compare the parameters detectable using this mode with those observed using other configurations, such as the D…
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