Abstract
This paper describes the morphology of midnight sector and morning sector auroral zone scintillation observations made over a two‐year period using the Wideband satellite, which is in a sun‐synchronous, low‐altitude orbit. No definitive seasonal variation was found. The nighttime data showed the highest scintillation occurrence levels, but significant amounts of morning scintillation were observed. For the most part the scintillation activity followed the general pattern of local magnetic activity. The most prominent feature in the nighttime data is a localized amplitude and phase scintillation enhancement at the point where the propagation vector lies within an L shell. A geometrical effect due to a dynamic slab of sheetlike structures in the F region is hypothesized as the source of this enhancement. The data have been sorted by magnetic activity, proximity to local midnight, and season. The general features of the data are in agreement with the accepted morphology of auroral zone scintillation.
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