Abstract: High-frequency (HF) skywave signals can propagate across vast distances due to ionospheric refraction, rendering conventional line-of-sight (LOS) geolocation methods inadequate for accurate ...
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How cities are using trees to reduce urban heat
Cities are turning to trees as natural air conditioners. Shade, cooling, and greener streets are helping communities beat the heat. It’s a simple idea with a big urban impact. 🌳🌞 #UrbanHeat #Trees ...
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