Video At the end of the month, NASA will launch one of its most unusual satellites yet: a radar hurling a 19-foot-long (6-metre) mesh antenna around its head every four seconds.
"We call it the spinning lasso," said Wendy Edelstein, instrument manager for the Soil Moisture Active Passive (SMAP) sensor built by NASA's Jet Propulsion Laboratory in Pasadena, California.
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