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Precise time and time interval (PTTI), an overviewPresent applications of precise time and frequency (T/F) technology can be grouped as follows: (1) Communications systems which require T/F for time division multiplexing and for using spread spectrum techniques. (2) Navigation systems which need T/F for position fixing using a timed signal. (3) Scientific-Metrological applications which use T/F as the most precisely reproducible standard of measurement. (4) Astronomical-Space applications which cover a variety of the most demanding applications such as pulsar research, Very Long Baseline Interferometry (VLBI) and laser/radar ranging. In particular, pulsar time-of-arrival measurements require submicrosecond precision over a period of one-half year referred to an extraterrestrial inertial system, and constitute the most stringent requirements for uniform timekeeping to date.
Document ID
19750019102
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Winkler, G. M. R. (Naval Observatory Washington, DC, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Publication Information
Publication: NASA. Goddard Space Flight Center Proc. of the Sixth Ann. Precise Time and Time Interval (PTTI) Planning Meeting
Subject Category
Instrumentation And Photography
Accession Number
75N27174
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19750019101Collected WorksProceedings of the Sixth Annual Precise Time and Time Interval (PTTI) Planning Meeting
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