Postprocessed Timescales at the U.S. Naval Observatory

Postprocessed Timescales at the U.S. Naval Observatory

A set of free-running timescales is generated using 9 gears of &fa from the USNO clock ensemble. Cesium and maser clock phases and frequencies are characterized by global fits to first- or second order polynomials, and the timescales are generated from the clocks' detrended frequencies usin...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Matsakis, Demetrios, Breakiron, Lee A
Format: Report
Sprache:eng
Schlagworte:
ALGORITHMS
CESIUM
CLOCKS
MASERS
Numerical Mathematics
POLYNOMIALS
STABILITY
WEIGHTING FUNCTIONS
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Beschreibung
Zusammenfassung:A set of free-running timescales is generated using 9 gears of &fa from the USNO clock ensemble. Cesium and maser clock phases and frequencies are characterized by global fits to first- or second order polynomials, and the timescales are generated from the clocks' detrended frequencies using a variety of weighting functions. These timescales are compared to those generated by USNO's A.1, BIPM's ALGOS and TT98, and NIST's AT1 algorithms from the perspective of algorithm choice and frequency stability. See also ADA415578. Presented at the Annual Precise Time and Time Interval (PTTI) Systems and Applications Meeting (30th) held in Reston, VA on 1-3 Dec 1998. Published in the Annual Precise Time and Time Interval Systems and Applications Meeting Proceedings, p19-34, Dec 1998.