Wi‑Fi Sensing (IEEE 802.11bf) repurposes 2.4 GHz, 5 GHz, and 6 GHz Wi‑Fi signals to detect movement across a typical home, offering tens of meters of range, millisecond‑level latency, and energy‑efficient operation by piggybacking on existing routers. Ultra‑Wideband (UWB; IEEE 802.15.4z) uses ultra‑wide pulses around 6–8 GHz to measure time‑of‑flight with centimeter‑level accuracy, typically 10–15…
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Biomass was selected in May 2013 as ESA’s seventh Earth Explorer mission to quantify forest carbon from space. The mission uses a P-band synthetic aperture radar at ~435 MHz (about 70 cm wavelength) with a 12-meter mesh reflector deployed in orbit to penetrate canopies and sense trunks. It employs fully polarimetric SAR (HH, HV, VH,…
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