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Image Credit: Twitter/@NASA

NASA's new satellite to study global warming by measuring ice sheet height

To study the effects of global warming on the ice sheet in Antarctica, Greenland and ice floating in the Arctic Ocean, NASA has launched ICESat-2, a satellite equipped with a laser to map the cryosphere. The satellite, which is 500 km above Earth, uses a technique called 'photon counting' to estimate the ice thickness, where 10,000 pulses are fired towards Earth, which then bounce back in about 3.3 milliseconds.