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T and F comparisons via broadcasting satellite and navigation technology satelliteThe preliminary time/frequency dissemination experiments were made using the BSE. In order to establish the technique of the doppler shift canceling, the phase control servo including the satellite link and the precompensating frequency control using the measured values or using the orbital data of the satellite are tested. The amount of the residual doppler shift at the control station can be reduced to the order of 1 part in 10 to the 12th power or less by use of the first and the second methods. The method using the orbit data is expected to give a control capability of a few parts in 10 to 11th power. Thus, the maximum value of the doppler shift at the farther most place of the country is estimated to be + or - 2 x 10 to the -10 power without any correction. The experiment of the international time comparison via the NTS 1 was made for about one year since October 1978. The data of time difference between UTC(USNO) and UTC(RRL) are in good agreement with those via the portable clock of the USNO. By applying the correction for ionospheric delay the standard deviation of the data can be reduced to about one-half.
Document ID
19800020610
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Saburi, Y.
(Radio Research Labs. Tokyo, Japan)
Yasuda, Y.
(Radio Research Labs. Tokyo, Japan)
Kobayashi, S.
(Radio Research Labs. Tokyo, Japan)
Sato, T.
(Radio Research Labs. Tokyo, Japan)
Date Acquired
August 10, 2013
Publication Date
January 1, 1979
Publication Information
Publication: NASA. Goddard Space Flight Center Proc. of the 11th Ann. Precise Time and Time Interval (PTTI) Appl. and Planning Meeting
Subject Category
Physics (General)
Accession Number
80N29111
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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