Widely Separated Clocks with Microsecond Synchronization and Independent Distribution Systems

Doherty, R. H.

doi:10.1109/iret-set.1960.5008733

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Uhf Time-distribution System1

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1961

1979

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Cited by 3 publications

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“…The most efficient scheme that could be visualized to distribute time locally was to use a single Loran-C clock in combination with a UHF transmitter to reach the terminal instruments. As a corollary to the clock development, an experimental UHF time-distribution system was also developed (Davis and Doherty, 1960).…”

Section: Uhf Time-distribution Systemmentioning

confidence: 99%

The Development of Loran-C navigation and timing

Hefley¹

1972

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Section: Uhf Time-distribution Systemmentioning

confidence: 99%

The Development of Loran-C navigation and timing

Hefley¹

1972

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A review of satellite time transfer technology: Accomplishments and future applications

Cooper¹,

Andrew²

1979

Radio Science

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A brief review of the research accomplishments by NASA in meeting the needs of the space program for precise time in satellite tracking is presented. As a major user of precise time signals for clock synchronization of NASA's worldwide satellite tracking networks, the agency provided much of the necessary impetus for the development of stable frequency sources and time synchronization technology. The precision in time required for both satellite tracking and space science experiments has increased at a rate of about 1 order of magnitude per decade from 1 ms in the 1950's to 100 μs during the Apollo era in the 1960's to 10 μs in the 1970's. In the 1980's, when the Tracking and Data Relay Satellite System (TDRSS) comes into operation, satellite timing requirements will be extended to 1 μs and below. These requirements are needed for spacecraft autonomy and data packeting which are now in active planning stages.

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