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nasa t1_ivktekj wrote

Reply to comment by kkalmightyagain in AskScience AMA Series: We're NASA experts working on SWOT - an upcoming mission that will observe nearly all water on Earth's surface. Ask us anything! by AskScienceModerator

SWOT will measure over 90% of the water on Earth. SWOT will measure the Earth's surface between 78 degrees south (where Antarctica is located) and 78 degrees north (where Greenland is located). So, it won't see any water located at very high latitudes near the poles. -BH

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