Sigfrido Leschiutta CCTF Chairman
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1 Sigfrido Leschiutta CCTF Chairman CCTF CONSULTATIVE COMMITTEE FOR TIME AND FREQUENCY REPORT FOR THE XXII CONFÉRENCE GÉNÉRALE DES POIDS ET MESURES Paris, 8-13 October 2003
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CCTF CONSULTATIVE COMMITTEE FOR TIME AND FREQUENCY REPORT FOR THE XXII CONFÉRENCE GÉNÉRALE DES POIDS ET MESURES Paris, 8-13 October 2003. Sigfrido Leschiutta CCTF Chairman. XXII CGPM CCTF REPORT. • the second frequency standards the hour time scales - PowerPoint PPT Presentation
Transcript of Sigfrido Leschiutta CCTF Chairman
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Sigfrido LeschiuttaCCTF Chairman
CCTF CONSULTATIVE COMMITTEE FOR TIME AND FREQUENCY
REPORT FOR THEXXII CONFÉRENCE GÉNÉRALE
DES POIDS ET MESURESParis, 8-13 October 2003
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XXII CGPMCCTF REPORT
• the second frequency standards
• the hour time scales
• global clock comparisons how compare the clocks of the NMI’s
• clocks and frequency standards uses in Science and Technology
• joint activity CCL-CCTF toward future secondary optical definition of the second
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the best atomic clocks
caesium fountains
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SYRTE-FO2
FRANCE
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NIST-F1USA
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PTB-CSF1
GERMANY
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IEN-CSF1 ITALY
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38 countries participating into TAI:
Poland Israel ThailandAustralia Portugal SpainAustria Norway Hong-KongChina Lithuania U.K.Switzerland Japan SwedenMexico Romania SlovakiaGermany USA IndiaItaly Bulgaria CanadaArgentina Singapore Russian FederationCzeck Republic Korea, Rep. of Chinese TaipeiTurkey South Africa New ZealandFrance The Netherlands BelgiumBrazil Chile
53 laboratories participating into TAI
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XXII CGPMCCTF REPORT
• clocks and frequency standards uses in Science and Technology• fundamental research and fundamental constants
• metrological applications, outside time
• telecommunications
• satellite navigation systems
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XXII CGPMCCTF REPORT
ATOMIC CLOKSFOR SATELLITE NAVIGATION SYSTEMS
BEFORE 2003 AFTER 2005
GPS GLONASS WAAS EGNOS GALILEO
Space 90 90 0 0 90
Earth 20 - 25 15 - 20 80 10 - 20 35-40
Total 115 110 80 10 - 20 120 - 130Grand total - about 450
all the figures are estimates
