Finding Ground-based Radars in SAR images: Localizing Radio Frequency Interference using Unsupervised Deep Learning

نویسندگان

چکیده

Synthetic Aperture Radar (SAR) satellite images are used increasingly more for Earth observation. While SAR useable in most conditions, they occasionally experience image degradation due to interfering signals from external radars, called Radio Frequency Interference (RFI). RFI affected often discarded further analysis or pre-processed remove the RFI. However, few on-ground radars can cause and such information thus increase domain awareness greatly over both land sea, where, e.g ., localizing characterizing ocean could help classify otherwise overlooked ships. The aim of current study is detect localize automatically Sentinel-1 level-1 characterize radar. spatial structure vary greatly. A convolutional autoencoder was therefore developed reconstruct RFI-free images. Conversely, RFI-affected not be well reconstructed. Anomalous heatmaps were then anomalies under varying environmental geographical conditions whereafter radar characteristics extracted manually level-0 data. We consequently believed originate stationary ship-borne radars. argue that calculated correspond those air-surveillance Empirically, method showed better detection results than previous studies. Our shows certain detected objects, as ships,

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ژورنال

عنوان ژورنال: IEEE Transactions on Geoscience and Remote Sensing

سال: 2023

ISSN: ['0196-2892', '1558-0644']

DOI: https://doi.org/10.1109/tgrs.2023.3295002