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El Nino said to be lengthening the day, but not for long

...Spacecraft such as the Mars Pathfinder use tracking devices on Earth to orient and navigate themselves in space, said Byron D. Tapley, a University of Texas researcher who participated in Tuesday's panel. Part of that process is to figure out where...

http://chronicle.augusta.com/stories/1998/05/28/tec_229702.shtml
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