Concepts for high precision time and frequency transfer between Earth and space clocks

Author

Vessot, R.F.C. ; Antsos, D. ; Young, L.E.

Author_Institution

Smithsonian Astrophys. Obs., Cambridge, MA, USA

Volume

1

fYear

1999

fDate

1999

Firstpage

221

Abstract

Operation of new space fountain clocks now provides levels of accuracy and frequency stability approaching one part in 10¹⁶. We offer some ideas for providing access to this accuracy and stability with Doppler cancelling microwave techniques that employ coherent carrier phase. Corrections for relativistic effects will require continuous tracking of position and velocity at levels of precision that are now realistically expected from Global Positioning System which also provides time transfer capability to enable high precision orbit-to-orbit recovery of phase in the Doppler canceling system

Keywords

Doppler effect; Global Positioning System; clocks; frequency stability; frequency standards; ionospheric electromagnetic wave propagation; time measurement; transfer standards; Doppler canceling system; Doppler cancelling microwave techniques; Earth clocks; Global Positioning System; accuracy; corrections; frequency stability; frequency transfer; orbit-to-orbit recovery; relativistic effects; space clocks; stability; time transfer; Clocks; Delay effects; Earth; Frequency; Global Positioning System; Propagation delay; Satellite ground stations; Space technology; Space vehicles; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European

Conference_Location

Besancon

ISSN

1075-6787

Print_ISBN

0-7803-5400-1

Type

conf

DOI

10.1109/FREQ.1999.840747

Filename

840747