Word: radar
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Columbia space shuttle uses radar as a time machine...
...surface concealed a "large river without water." Last week a team of scientists from the U.S. and Egypt announced that they had definitive evidence that long ago a region of the vast desert in southern Egypt and northern Sudan was a lacy network of major water ways. The proof: radar images of the Sahara taken by the space shuttle Columbia...
...Science, was a serendipitous success for the flight of Columbia in November 1981. That mission had to be cut from 124 hr. to 54 hr. because of a faulty fuel cell, but before aborting the flight, the astronauts were able to complete an experiment with the ship's radar equipment. They took a 50-km-wide scan of the Sahara from the shuttle. Radar waves generally penetrate only a few centimeters of the earth, since the beams are dissipated by moisture in the surface of land. But in the dry Sahara, the radar waves were able to pierce...
...U.S.G.S. Research Geologist Carol Breed, "showed us a topography that could only have been buried. There was no trace of it on the surface." Marvels the head of the eight-member group interpreting the pictures, John F. McCauley of the U.S.G.S.: "We were able to look through and use radar as a time machine...
...once every 48 hr. in daylight. Big Bird sends back TV images and provides high-resolution photographs, which are ejected in parachute-equipped canisters that can be hooked in mid-air by recovery planes. Both the U.S. and the Soviet Union have satellites that can scan the earth with radar beams. One objective: to track naval vessels...