Ring Angels

IEEE Aerospace and Electronic Systems Magazine（2024）

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摘要

In the years following World War II, as radars became larger and more sensitive, echoes were occasionally observed, which did not appear to correspond with targets or clutter. These became known as angels. Several people attempted to find explanations for these, and in some cases they were found to be due to weather phenomena, in other cases they were ascribed to birds.

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关键词

Radar,L-band,Aerospace and electronic systems,Radar clutter,Echo interference,Acoustic measurements

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