The effect of subionospheric propagation on whistlers recorded by the DEMETER satellite – observation and modelling

During a routine analysis of whistlers on the wide-band VLF recording of the DEMETER satellite, a specific signal structure of numerous fractional-hop whistlers, termed the "Spiky Eyes Whistler" (SpW) was identified.These signals appear to be composed of a conventional whistler combined by the compound mode-patterns of guided wave propagation, sugg

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FEA-Swin: Foreground Enhancement Attention Swin Transformer Network for Accurate UAV-Based Dense Object Detection

UAV-based object detection has recently attracted a lot of attention due to its diverse applications.Most of the existing convolution neural network based object detection models Ringette Girdle can perform well in common object detection cases.However, due to the fact that objects in UAV images are spatially distributed in a very dense manner, the

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