| Document Date: 1998-07-29 12:32:20
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City Seneca / / Company IBM / Amp / Coordinated Universal Time UTC / / Currency pence / USD / / Facility U.S. Naval Observatory / National Institute of Science / / IndustryTerm navigation systems / carrier phase / software design / real-time playback / satellite systems / generator chip / carrier cycles / sufficient signal energy / acquisition and tracking algorithms / nth carrier cycle / satellite services / antenna site / metal box / rf-amplifier chip / carrier cycle / carrier cycle occurring / communication networks / analog-switch chip / pulse / following the third carrier cycle of the envelope pulse / / OperatingSystem DOS / / Organization National Institute of Science and Technology / U.S. Coast Guard / Global Positioning Service / Group of Eight / / Person LORAN-C / Preamplifier Figure / Block Diagram / / Position receiver and receiver controller / center conductor / receiver controller / whip / Controller / / ProgrammingLanguage D / / ProvinceOrState New York / / Region Northeast U.S. / / Technology coaxial cable / timekeeping technology / analog-switch chip / ADC0809 chip / GPS / AMD9513A chip / radio frequency / rf-amplifier chip / timing generator chip / adapter card / AD7528 chip / /
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1. Introduction As computers and communication networks become ever faster, there is a need to upgrade the timekeeping technology which timestamps transactions, controls real-time playback of video and audio data and syn