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GPS's 'Dress Rehearsal' for Year 2000 Problem

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Science  06 Aug 1999:
Vol. 285, Issue 5429, pp. 816
DOI: 10.1126/science.285.5429.816a

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As a result of an early programming decision in which designers of the U.S. military's Global Positioning System economized on computer memory by opting to track time on the satellites by counting weeks, on 21 August, timepieces on the fleet of GPS satellites will roll over to zero like car odometers hitting 100,000 miles. Manufacturers believe they've got the problem well in hand with software fixes for the receivers, but they expect some older receivers to act up--and advise caution during that last week of August.