Satellites that bounce radar pulses off snow and ice are among humanity’s most important eyes on the frozen planet. They track the thinning of ice sheets, measure the thickness of sea ice, and monitor frozen lakes across the polar regions. Yet turning the raw radar echoes returning from these surfaces into trustworthy numbers has always been a stubbornly difficult problem, because radar waves do not simply bounce off the top of the snow. They penetrate, scatter, and reflect from…
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Source bioengineer.org
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