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The flights will be conducted by a DC-8 outfitted as a special airborne laboratory with laser mapping instruments, ice-penetrating radar and gravity instruments.
CNN: NASA flights will study Antarctic ice changes
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Unlike rock, ice is transparent to radar.
BBC: Antarctic ice volume measured
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On Day 44 of the trek, both a radar device meant to measure the ice thickness and a satellite communications unit to relay the data are still not working - despite being brought back to the UK for repairs and then delivered to the team last week.
BBC: Arctic team gives up on ice radar
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The radar sends radio wave pulses into the ice sheet, and the waves bounce off buried features, informing researchers about the characteristics of the snow and ice layers.
ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)
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Cryosat's radar instrument will make detailed maps of the ice that covers both the sea and land at the poles.
BBC: Esa's Cryosat ice mission given launch date
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Where there is a risk tractors usually have a radar probe protruding in front of them looking for cracks in the ice.
BBC: Internet to reach South Pole
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This autonomous, solar-powered robot carries a ground-penetrating radar to study how snow accumulates, adding layer upon layer to the ice sheet over time.
ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)
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But since the 1960s, satellites and aircraft with powerful radar devices have discovered more and more lakes buried kilometres beneath the thick ice sheet.
BBC: NEWS | Science/Nature | Secret rivers found in Antarctic
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The radar system, known as Sprite and meant to be dragged over the ice making millions measurements, is now being carried on a sledge instead.
BBC: Arctic team gives up on ice radar