Activity report from NICT
|
|
- Winifred Richard
- 5 years ago
- Views:
Transcription
1 Activity report from NICT APMP 2013 / TCTF meeting November, 2013 National Institute of Information and Communications Technology (NICT) Japan 1 1
2 Activities of our laboratory Atomic Frequency Standards G Precise Atomic clocks development Opt. clock Opt. comb VLBI Generation, Measurement, and dissemination of the T&F standard Space-Time Measurement G at Kashima VLBI technique for precise T&F transfer Japan Standard Time G at Koganei T&F transfer Techniques by using the Optical fibers And satellites TWSTFT GNSS Cs primary Generation and Dissemination Of Japan Standard Time Opt. fiber 2
3 Staffs in our laboratory Space-Time Standard Laboratory Y. Hanado, Tech. Expert: 1 M. Hosokawa Y. Koyama Japan Standard Time G. K. Imamura, T. Iwama Researcher: Tech. Expert: 2 Space-Time Measurement G. R. Ichikawa Researcher: Guest researcher: 1 Tech. Expert: 1 Atomic Frequency Standards G. T. Ido Researcher: Guest researcher: 2 Tech. Expert: 4 Space-Time Meas. G. at Kashima M. Sekido Researcher: 3 Tech. Expert: 1 3
4 JST : Time scale generation Clocks for generating UTC(NICT) : Cs 5071A : 18 (ensemble timescale) Anritsu H-Masers : 3 (signal source) The behavior of UTC(NICT) : UTC UTC(NICT) < 20 ns, Stability reaches to 1E-15. Kobe LF60 LF40 Kashima Satellite Tokyo Time Transfer As a new approach, distributed generation system of Japan Standard Time is under development. Ensemble timescale At Kobe ~ Ensemble timescale At Tokyo The experimental room has been completed in the Kobe branch. 4
5 JST : Dissemination and Calibration LF stations LF40 : 1999 ~ LF60 : 2001 ~ System renewal of both stations have started. hagane-yama station 60kHz 23kW Ohtakadoya -yama station 40kHz 13kW Time stamping service Calibration system Telephone JJY Access > 1.4E5 /month. Accesses are increasing. Public NTP FPGA-based NTP server can accept up to 1 million requests / sec. Accesses > 200 million / day. Time calibration signal (in LF) repeater Precision < 10 ms Cover area < 10 m NTP Server Inter net signal repeater < 10 m 5
6 T&F Transfer Regular operation GPS time link: Septentrio dual freq. receivers are used for TAI TWGPPP link. Research of advanced techniques Advanced TWSTFT (DPN*, Carrier Phase) New analysis software for both GNSS and VLBI Optical fiber transfer TWSTFT: Asia : IS-8 => GE-23 Asia -EU : AM-2 (used for TWGPPP link) Asia -Hawaii US : GE-23, AMC1. NICT VLBI for T&F transfer AM2@80 GE23@172 6
7 T&F Transfer : TWSTFT carrier phase Due to H-maser M odified Allan deviation Measurement stability of TWSTFT carrier phase Due to phase variation induced by room temperature variation 0 km 100 km 1000 km km km Averaging time [s] 0 km: free from stability of ref.-clocks 100 km: Tokyo-Kashima, H-maser comparison 1000 km: Tokyo-Okinawa, H-maser comparison Sr-Sr link was also tested km: NICT-PTB, UTC(k) or H-maser comparison Short-term stability 1s) is independent of baseline length. 7
8 T&F Transfer : VLBI, analysis software VLBI for T&F transfer New wideband feed system, Effective sampling procedure, High-speed correlation procedure, are in progress. Original transportable telescope is evaluated for transportation. => NICT - NMIJ experiment, soon. 34mφ New analysis software for GNSS, VLBI and SLR Novel multi-technique space geodetic analysis software (C5++) is under development. Estimation of common parameters (clocks, troposphere, orbits) among different techniques redundancy Supports local-tie information between the techniques. 1.6mφ NICT NMIJ 1.6mφ 8
9 Atomic clocks and Advanced techniques Microwave clocks Cs Fountain Yb + standard Toward the THz standard NICT-CsF1 NICT-CsF2 (2006~) (under development) Optical clocks z r U THz comb Ultrastable laser Ion-trap Optical lattice Optical comb 9
10 Cs fountain primary frequency standard NICT-CsF1 Typical uncertainty is 1.4 x since Recent Upgrading: Improvements of vacuum Installations of a rapid adiabatic passage method. NICT-CsF2 NICT-CsF1 CSO (Cryogenic Sapphire Oscillator) NICT-CsF2 using a pure optical molasses is under development. Most systematic shifts are evaluated at a level below 5 x uncertainty. Frequency stability of 3 x /τ 1/2, and averages down to the statistic uncertainty at the level Hz Frequency Hz NICT-CsF2 10
11 Optical clocks Ion-trap optical clock NICT develops both type of optical frequency standards Optical lattice clock In + -Ca + Ion trap : 87 Sr lattice clock : In + In + NICT Stationary Satellite 16 Height : 36,000 km 1 In + & 2 Ca + trapped in a linear trap Next goal In + 3 time clock operation using 1 S 0-3 P 1 detection Sr Sr Next goal PTB Cryogenic clock NICT-PTB direct comparison Via TWCP 11
12 NICT-PTB direct comparison 1E-14 ADEV 1E-15 Blue: all data during 4days Black: long coherent data at June 26 th averaging time (s) 250 Histogram 200 Identical frequency confirmed with an uncertainty < Occurrences E E E Sr(PTB)/Sr(NICT)-1
13 New approaches to THz standard Toward the THz standard Trial to establish a new frequency standard in THz domain. Absolute frequency measurement system is under development. Measurement stability : 1E-15 level around 300 GHz. 636GHzsignal was also measured with the same scheme. Measurement system and measured stability of 300 GHz. 13
14 Summary of topics Japan Standard Time: Distributed generation system is under development. System renewal of two LF stations have started. T&F transfer: TWSTFT Carrier Phase exp. of NICT PTB was achieved. Short-term stability = 3 x 1s. The first trial of Sr(NICT) Sr(PTB) by TWSTFT CP. Atomic clocks and advanced technique: In the optical clocks, In + ion-trap clock and 2 nd Sr lattice clock are under development. Toward the THz standards, basic techniques are in progress. 14
Activity report from NICT
Activity report from NICT APMP 2015 / TCTF meeting 2-3 November, 2015 National Institute of Information and Communications Technology (NICT) Japan 1 1 Space time standards laboratory Atomic Frequency Standards
More informationTime and Frequency Activities at NICT, Japan
Time and Frequency Activities at NICT, Japan Yasuhiro Koyama, Kuniyasu Imamura, Tsukasa Iwama, Shin'ichi Hama, Jun Amagai, Ryuichi Ichikawa, Yuko Hanado, and Mizuhiko Hosokawa National Institute of Information
More informationActivity report from NICT
Activity report from NICT APMP 2016 / TCTF meeting 14-15 November, 2016 National Institute of Information and Communications Technology (NICT) Japan 1 1 Space time standards laboratory Atomic Frequency
More informationActivity report from NICT
Activity report from NICT APMP 2017 / TCTF meeting 27-28 November, 2017 National Institute of Information and Communications Technology (NICT) Japan 1 1 Space time standards laboratory Atomic Frequency
More informationTime and Frequency Activities at NICT, Japan
Time and Frequency Activities at NICT, Japan Yasuhiro Koyama, Kuniyasu Imamura, Tsukasa Iwama, Shin'ichi Hama, Jun Amagai, Ryuichi Ichikawa, and Mizuhiko Hosokawa National Institute of Information and
More informationReport of Time and Frequency Activities at NICT
Report of Time and Frequency Activities at NICT National Institute of Information and Communications Technology Koganei, Tokyo, Japan 1. Introduction At National Institute of Information and Communications
More informationTIME AND FREQUENCY ACTIVITIES AT NICT, JAPAN
TIME AND FREQUENCY ACTIVITIES AT NICT, JAPAN Yasuhiro Koyama, Kuniyasu Imamura, Tsukasa Iwama, Shin'ichi Hama, Jun Amagai, Ryuichi Ichikawa, and Mizuhiko Hosokawa National Institute of Information and
More informationLaboratory Report National Institute of Information and Communications Technology (NICT), Japan. Section 1: Laboratory Related Matters
32 nd Asia Pacific Metrology Programme General Assembly 17-18 November 2016 Da Nang, Vietnam Laboratory Report National Institute of Information and Communications Technology (NICT), Japan Section 1: Laboratory
More informationReport of Time and Frequency Activities at NICT
Report of Time and Frequency Activities at NICT National Institute of Information and Communications Technology Koganei, Tokyo, Japan 1. Introduction The National Institute of Information and Communications
More informationReport of Time and Frequency Activities at NICT ( )
Report of Time and Frequency Activities at NICT (2012-2015) National Institute of Information and Communications Technology Koganei, Tokyo, Japan 1. Introduction The National Institute of Information and
More information33rd Asia Pacific Metrology Programme General Assembly 24 November 1 December 2017 New Delhi, India
33rd Asia Pacific Metrology Programme General Assembly 24 November 1 December 2017 New Delhi, India Laboratory Report National Institute of Information and Communications Technology (NICT), Japan Section
More informationTime and Frequency Activities at KRISS
Time and Frequency Activities at KRISS Dai-Hyuk Yu Center for Time and Frequency Metrology, Division of Physical Metrology Korea Research Institute of Standards and Science (KRISS) dhyu@kriss.re.kr Time
More informationStatus Report on Time and Frequency Activities at National Physical Laboratory India
Status Report on Time and Frequency Activities at National Physical Laboratory India (TCTF 2015) Ashish Agarwal *, S. Panja. P. Arora, P. Thorat, S. De, S. Yadav, P. Kandpal, M. P. Olaniya, S S Rajput,
More informationResearch Activities on Time and Frequency National Metrology Institute of Japan (NMIJ)/AIST
CCTF/12-13 Report to the 19th Meeting of CCTF Research Activities on Time and Frequency National Metrology Institute of Japan (NMIJ)/AIST The National Metrology Institute of Japan (NMIJ) is responsible
More information5-3 JJY, The National Standard on Time and Frequency in Japan
5-3 JJY, The National Standard on Time and Frequency in Japan The Communications Research Laboratory (CRL) determines the national standard time and frequency in Japan, which is disseminated throughout
More informationReport to the 20th Meeting of CCTF Research Activities on Time and Frequency National Metrology Institute of Japan (NMIJ)/AIST
Report to the 20th Meeting of CCTF Research Activities on Time and Frequency National Metrology Institute of Japan (NMIJ)/AIST The National Metrology Institute of Japan (NMIJ) is responsible for almost
More informationHaruo Saito. National Institute of Information and Communications Technology
Calibration system at NICT Haruo Saito National Institute of Information and Communications Technology Organization of NICT Content Calibration system Calibration system Carried in system and remote system
More information2-2 Summary and Improvement of Japan Standard Time Generation System
2-2 Summary and Improvement of Japan Standard Time Generation System NAKAGAWA Fumimaru, HANADO Yuko, ITO Hiroyuki, KOTAKE Noboru, KUMAGAI Motohiro, IMAMURA Kuniyasu, and KOYAMA Yasuhiro Japan Standard
More informationOVERVIEW OF RESEARCH ACTIVITIES ON TIME AND FREQUENCY AT THE NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
OVERVIEW OF RESEARCH ACTIVITIES ON TIME AND FREQUENCY AT THE NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY Mizuhiko Hosokawa, Yukio Takahashi, Shin ichi Hama, Hiroshi Toriyama, and Takao
More informationTime & Frequency Transfer
Cold Atoms and Molecules & Applications in Metrology 16-21 March 2015, Carthage, Tunisia Time & Frequency Transfer Noël Dimarcq SYRTE Systèmes de Référence Temps-Espace, Paris Thanks to Anne Amy-Klein
More informationReport of the TC Time and Frequency. Ramiz Hamid TC-TF Chair, TÜBİTAK UME, Turkey
Report of the TC Time and Frequency Ramiz Hamid TC-TF Chair, TÜBİTAK UME, Turkey Contents TC-TF meeting and T&F strategy EMRP Projects and future optical redefinition of the second Time scale generation
More informationUpdate of research activities on time and frequency at the National Institute of Information and Communications Technology (NICT)
Update of research activities on time and frequency at the National Institute of Information and Communications Technology (NICT) Shin ichi Hama, Mizuhiko Hosokawa, Yukio Takahashi, Hiroshi Toriyama, and
More informationTwo-Way Time Transfer via Satellites and Optical Fibers. Physikalisch-Technische Bundesanstalt
Two-Way Time Transfer via Satellites and Optical Fibers Dirk Piester Physikalisch-Technische Bundesanstalt Time Dissemination Group (4.42) 42) 1 Outline Two-way satellite time and frequency transfer (TWSTFT)
More informationCCTF 2012 Report on Time & Frequency activities at National Physical Laboratory, India (NPLI)
CCTF 2012 Report on Time & Frequency activities at National Physical Laboratory, India (NPLI) Major activities of the Time & Frequency division of NPLI in the last three years have been: 1. Maintenance
More informationStatus Report on Time and Frequency Activities at CSIR-NPL India
Status Report on Time and Frequency Activities at CSIR-NPL India (APMP -TCTF 2016) S. Panja, A. Agarwal, D. Chadha, P. Arora, P. Thorat, S. De, S. Yadav, P. Kandpal, M. P. Olaniya and V. N. Ojha (Da Nang,
More informationNational time scale UTC(SU) and GLONASS system time scale: current status and perspectives
State Scientific Center of the Russian Federation National Research Institute for Physical-Technical and Radio Engineering Measurements National time scale UTC(SU) and GLONASS system time scale: current
More informationStatus Report on Time and Frequency Activities at NPL India
Status Report on Time and Frequency Activities at NPL India (APMP TCTF 2013) A. Sen Gupta, A. Chatterjee, A. K. Suri, A. Agarwal, S. Panja P. Arora, S. De, P. Thorat, S. Yadav, P. Kandpal, M. P. Olaniya
More informationR&D for Satellite Navigation
2009, Oct.23 NICT R&D for Satellite Navigation NICT, JAXA and some institutes are working for R&D on satellite navigation. NICT focuses the effort on T&F technology; ETS-Ⅷ (Engineering Test Satellite 8),
More informationTime and Frequency Activities at KRISS
Time and Frequency Activities at KRISS Dai-Hyuk Yu Center for Time and Frequency, Division of Physical Metrology Korea Research Institute of Standards and Science (KRISS) dhyu@kriss.re.kr Time and Frequency
More informationVLBI MEASUREMENTS FOR FREQUENCY TRANSFER
Joint Discussion 6 Time and Astronomy IAU XXVII GENERAL ASSEMBLY AUGUST 6, 2009 Rio de Janeiro, Brazil MEASUREMENTS FOR FREQUENCY TRANSFER 2 Hiroshi Takiguchi (htaki@nict.go.jp), Yasuhiro Koyama, Ryuichi
More informationNov.6-7,2014 DEC Workshop on Participation in Coordinated Universal Time. Aimin Zhang National Institute of Metrology (NIM)
Nov.6-7,2014 DEC Workshop on Participation in Coordinated Universal Time Aimin Zhang National Institute of Metrology (NIM) Introduction UTC(NIM) at old campus Setup of new UTC(NIM) Algorithm of UTC(NIM)
More informationNPLI Report. for. Technical workshop and inter-laboratory comparison exercise for GPS time-transfer and calibration techniques under MEDEA
NPLI Report for Technical workshop and inter-laboratory comparison exercise for GPS time-transfer and calibration techniques under MEDEA Dr. V. N. Ojha, Dr. A. Agarwal, Mrs. D. Chaddha, Dr. S. Panja, Dr.
More informationSTABILITY OF GEODETIC GPS TIME LINKS AND THEIR COMPARISON TO TWO-WAY TIME TRANSFER
STABILITY OF GEODETIC GPS TIME LINKS AND THEIR COMPARISON TO TWO-WAY TIME TRANSFER G. Petit and Z. Jiang BIPM Pavillon de Breteuil, 92312 Sèvres Cedex, France E-mail: gpetit@bipm.org Abstract We quantify
More informationImprovement GPS Time Link in Asia with All in View
Improvement GPS Time Link in Asia with All in View Tadahiro Gotoh National Institute of Information and Communications Technology 1, Nukui-kita, Koganei, Tokyo 18 8795 Japan tara@nict.go.jp Abstract GPS
More informationSECONDARY REPRESENTATION OF THE SI SECOND. Dale Henderson
Dale Henderson to provide an ultra-high stability microwave frequency standard to underpin the noise analysis of the primary standards of time and length. main deliverable will be a high-flux rubidium-87
More informationTime and Frequency Laboratory Measurement Units, Standards and Services Department (National Metrology Institute) MUSSD- Sri Lanka
Time and Frequency Laboratory Measurement Units, Standards and Services Department (National Metrology Institute) MUSSD- Sri Lanka Introduction Measurement Units, Standards and Services Department (MUSSD
More information5-2 Generating and Measurement System for Japan Standard Time
5-2 Generating and Measurement System for Japan Standard Time HANADO Yuko, IMAE Michito, KURIHARA Noriyuki, HOSOKAWA Mizuhiko, AIDA Masanori, IMAMURA Kuniyasu, KOTAKE Noboru, ITO Hiroyuki, SUZUYAMA Tomonari,
More informationTime and Frequency Research Activity in NIM
Time and Frequency Research Activity in NIM Gao Xiaoxun National Institute of Metrology Bei San Huan Dong Lu No.18 Beijing P.R.China Abstract This paper will introduce scientific research activities in
More informationImpact of multi-gnss on international timekeeping
Impact of multi-gnss on international timekeeping Elisa Felicitas Arias and Wlodek Lewandowski 5th ICG Meeting Torino (Italy), 18-22 October 2010 Outline Time scale contruction, case of UTC Role of GNSS
More informationCCTF Working Group on coordination of the development of advanced time and frequency transfer techniques (WG ATFT)
CCTF/12-43 CCTF Working Group on coordination of the development of advanced time and frequency transfer techniques (WG ATFT) Report to the19th meeting of the Consultative Committee for Time and Frequency,
More informationOptical clocks and combs at NMIJ
APMP 2013, TCTF Workshop, Taipei 23 Nov. 2013 Optical clocks and combs at NMIJ F.-L. Hong, D. Akamatsu, M. Yasuda, H. Inaba, K. Hosaka, S. Okubo, T. Tanabe, T. Kohno, Y. Nakajima, K. Iwakuni, T. Suzuyama,
More informationReport of the CCTF WG on TWSTFT. Dirk Piester
Report of the CCTF WG on TWSTFT Dirk Piester Two-way satellite time and frequency transfer (TWSTFT) How does it work? Phase coherent to a local clock pseudo random noise phaseshift keying spread spectrum
More informationSTABILITY OF GEODETIC GPS TIME LINKS AND THEIR COMPARISON TO TWO-WAY TIME TRANSFER
STABILITY OF GEODETIC GPS TIME LINKS AND THEIR COMPARISON TO TWO-WAY TIME TRANSFER G. Petit and Z. Jiang BIPM Pavillon de Breteuil, 92312 Sèvres Cedex, France E-mail: gpetit@bipm.org Abstract We quantify
More informationDEVELOPMENT OF FREQUENCY TRANSFER VIA OPTICAL FIBER LINK AT NICT
DEVELOPMENT OF FREQUENCY TRANSFER VIA OPTICAL FIBER LINK AT NICT Motohiro Kumagai, Miho Fujieda, Tadahiro Gotoh, and Mizuhiko Hosokawa National Institute of Information and Communications Technology, 4-2-1
More informationVLBI and GNSS frequency link stabilities during CONT campaigns
VLBI and GNSS frequency link stabilities during CONT campaigns Rüdiger Haas 1, Carsten Rieck 2, Per Jarlemark 2 (1) Chalmers University of Technology, Department of Earth and Space Sciences, Onsala Space
More informationNew Broadband VLBI System for High Precision Delay Measurement
New Broadband VLBI System for High Precision Delay Measurement 1 National Institute of Information and Communications Technology(NICT) M. Sekido, K. Takefuji, H. Ujihara, T. Kondo, Y. Miyauchi, M. Tsutsumi,
More informationTIME AND FREQUENCY ACTIVITIES AT THE CSIR NATIONAL METROLOGY LABORATORY
TIME AND FREQUENCY ACTIVITIES AT THE CSIR NATIONAL METROLOGY LABORATORY E. L. Marais and B. Theron CSIR National Metrology Laboratory PO Box 395, Pretoria, 0001, South Africa Tel: +27 12 841 3013; Fax:
More informationMETAS TIME & FREQUENCY METROLOGY REPORT
METAS TIME & FREQUENCY METROLOGY REPORT Laurent-Guy Bernier METAS Federal Office of Metrology Lindenweg 50, Bern-Wabern, Switzerland, CH-3003 E-mail: laurent-guy.bernier@metas.ch, Fax: +41 31 323 3210
More informationPrecise Common-View Time and Frequency Transfer (PCVTFT) based on BDS GEO Satellite
IGS workshop 2016, UNSW, Australia Precise Common-View Time and Frequency Transfer (PCVTFT) based on BDS GEO Satellite Yang Xuhai,Wei Pei,Sun Baoqi,Liu Jihua,Wang Wei National Time Service Center (NTSC),Chinese
More informationCURRENT ACTIVITIES OF THE NATIONAL STANDARD TIME AND FREQUENCY LABORATORY OF THE TELECOMMUNICATION LABORATORIES, CHT TELECOM CO., LTD.
CURRENT ACTIVITIES OF THE NATIONAL STANDARD TIME AND FREQUENCY LABORATORY OF THE TELECOMMUNICATION LABORATORIES, CHT TELECOM CO., LTD., TAIWAN C. S. Liao, P. C. Chang, and S. S. Chen National Standard
More informationGPS Carrier-Phase Time Transfer Boundary Discontinuity Investigation
GPS Carrier-Phase Time Transfer Boundary Discontinuity Investigation Jian Yao and Judah Levine Time and Frequency Division and JILA, National Institute of Standards and Technology and University of Colorado,
More informationReport to the 20th CCTF, September 2015
Report to the 20th CCTF, September 2015 LNE-SYRTE Observatoire de Paris, LNE, CNRS, UPMC 61 avenue de l Observatoire 75014 Paris, France https://syrte.obspm.fr This report describes activities in Time
More informationProgramme of work and budget for Plans for Time Department
Programme of work and budget for 2013-2015 Plans for 2016-2019 Time Department Elisa Felicitas Arias 101 th Meeting of the CIPM, Session 1 BIPM, Sèvres, 8 June 2012 Programme of work 2013-2015 Continues
More informationExpert Site Visit Report
Expert Site Visit Report Time and Frequency Metrology Sub Division Research Center for Metrology Indonesian Institute of Sciences RCM LIPI Metrology Enabling Developing Economies in Asia, MEDEA Project
More informationTIME TRANSFER EXPERIMENT BY TCE ON THE ETS-VIII SATELLITE
TIME TRANSFER EXPERIMENT BY TCE ON THE ETS-VIII SATELLITE Fumimaru Nakagawa, Yasuhiro Takahashi, Jun Amagai, Ryo Tabuchi, Shin ichi Hama, and Mizuhiko Hosokawa National Institute of Information and Communications
More informationSTATUS REPORT OF TIME AND FREQUENCY LAB. (VIETNAM METROLOGY INSTITUTE)
STATUS REPORT OF TIME AND FREQUENCY LAB. (VIETNAM METROLOGY INSTITUTE) Trieu Viet Phuong Head of Time and Frequency Laboratory, VMI Email: phuongtv@vmi.gov.vn DA NANG 11-2016 About TFL Laboratory of time
More informationTHE TIMING ACTIVITIES OF THE NATIONAL TIME AND FREQUENCY STANDARD LABORATORY OF THE TELECOMMUNICATION LABORATORIES, CHT CO. LTD.
THE TIMING ACTIVITIES OF THE NATIONAL TIME AND FREQUENCY STANDARD LABORATORY OF THE TELECOMMUNICATION LABORATORIES, CHT CO. LTD., TAIWAN P. C. Chang, J. L. Wang, H. T. Lin, S. Y. Lin, W. H. Tseng, C. C.
More informationLONG-BASELINE TWSTFT BETWEEN ASIA AND EUROPE
LONG-BASELINE TWSTFT BETWEEN ASIA AND EUROPE M. Fujieda, T. Gotoh, M. Aida, J. Amagai, H. Maeno National Institute of Information and Communications Technology Tokyo, Japan E-mail: miho@nict.go.jp D. Piester,
More informationPRELIMINARY EVALUATION OF CESIUM ATOMIC FOUNTAIN NICT-CSF2
PRELIMINARY EVALUATION OF CESIUM ATOMIC FOUNTAIN NICT-CSF2 Motohiro Kumagai, Clayton R. Locke, Hiroyuki Ito, Masatoshi Kajita, Yuko Hanado and Mizuhiko Hosokawa National Institute of Information and Communications
More informationPTB S TIME AND FREQUENCY ACTIVITIES IN 2006: NEW DCF77 ELECTRONICS, NEW NTP SERVERS, AND CALIBRATION ACTIVITIES
PTB S TIME AND FREQUENCY ACTIVITIES IN 2006: NEW DCF77 ELECTRONICS, NEW NTP SERVERS, AND CALIBRATION ACTIVITIES D. Piester, A. Bauch, J. Becker, T. Polewka, M. Rost, D. Sibold, and E. Staliuniene Physikalisch-Technische
More informationHIGH-PERFORMANCE RF OPTICAL LINKS
HIGH-PERFORMANCE RF OPTICAL LINKS Scott Crane, Christopher R. Ekstrom, Paul A. Koppang, and Warren F. Walls U.S. Naval Observatory 3450 Massachusetts Ave., NW Washington, DC 20392, USA E-mail: scott.crane@usno.navy.mil
More informationMeasurements and Distribution: PNT and Other Applications
NIST Time and Frequency Metrology Precision Time and Frequency Measurements and Distribution: PNT and Other Applications Tom O Brian Chief, NIST Time and Frequency Division and NIST Quantum Physics Division
More information2-5 Frequency Calibration
2-5 Frequency SAITO Haruo, IWAMA Tsukasa, TSUCHIYA Shigeru, and KOYAMA Yasuhiro The Japan Standard Time (JST) and the Coordinated Universal Time (UTC(NICT)), which are constructed by National Institute
More informationClock Comparisons: Present and Future Approaches
Clock Comparisons: Present and Future Approaches Introduction I. Dissemination of Legal Time II. Comparisons of Time Scales III. Comparisons of Primary Clocks MicrowaveTime & Frequency Comparisons GPS
More informationCalibration schedule 2016/9/29
Outline Time links calibration Equipment calibration NIM calibrator: Equipment, characteristics NIM calibrator: Operation Calibration campaign: Data and results 51 Calibration schedule 52 NTSC calibration
More informationComparison of Cesium Fountain Clocks in Europe and Asia
APMP/TCTF workshop 214,Daejeon, Korea Comparison of Cesium Fountain Clocks in Europe and Asia Aimin Zhang National Institute of Metrology(NIM) Sep.2,214 Outline Introduction Setup of PFS comparison Comparison
More informationA transportable optical frequency comb based on a mode-locked fibre laser
A transportable optical frequency comb based on a mode-locked fibre laser B. R. Walton, H. S. Margolis, V. Tsatourian and P. Gill National Physical Laboratory Joint meeting for Time and Frequency Club
More informationBroadband VLBI System GALA-V
Broadband VLBI System GALA-V Mamoru Sekido, K.Takefuji, H.Ujihara, T.Kondo, M.Tsutsumi, Y.Miyauchi, E.Kawai, S.Hasegawa, H.Takiguchi, R.Ichikawa,Y.Koyama, J.Komuro, K.Terada, K.Namba, R.Takahashi, T.Aoki,
More informationTHE STABILITY OF GPS CARRIER-PHASE RECEIVERS
THE STABILITY OF GPS CARRIER-PHASE RECEIVERS Lee A. Breakiron U.S. Naval Observatory 3450 Massachusetts Ave. NW, Washington, DC, USA 20392, USA lee.breakiron@usno.navy.mil Abstract GPS carrier-phase (CP)
More informationACTIVITIES AT THE STATE TIME AND FREQUENCY STANDARD OF RUSSIA
ACTIVITIES AT THE STATE TIME AND FREQUENCY STANDARD OF RUSSIA N. Koshelyaevsky, V. Kostromin, O. Sokolova, and E. Zagirova FGUP VNIIFTRI, 141570 Mendeleevo, Russia E-mail: nkoshelyaevsky@vniiftri.ru Abstract
More informationHOW TO HANDLE A SATELLITE CHANGE IN AN OPERATIONAL TWSTFT NETWORK?
HOW TO HANDLE A SATELLITE CHANGE IN AN OPERATIONAL TWSTFT NETWORK? Kun Liang National Institute of Metrology (NIM) Bei San Huan Dong Lu 18, 100013 Beijing, P.R. China E-mail: liangk@nim.ac.cn Thorsten
More informationTraceability measurement results of accurate time and frequency in Bosnia and Herzegovina
INFOTEH-JAHORINA Vol. 11, March 2012. Traceability measurement results of accurate time and frequency in Bosnia and Herzegovina Osman Šibonjić, Vladimir Milojević, Fatima Spahić Institute of Metrology
More informationTime and Frequency Transmission Facilities
Time and Transmission Facilities Ohtakadoya-yama LF Standard Time and Transmission Station Disseminating accurate Japan Standard Time (JST)! Time synchronization of radio clocks Time standard for broadcasting
More informationTHE FIRST TWO-WAY TIME TRANSFER LINK BETWEEN ASIA AND EUROPE
35 th Annual Precise Time and Time Interval (PTTI) Meeting THE FIRST TWO-WAY TIME TRANSFER LINK BETWEEN ASIA AND EUROPE H. T. Lin, W. H. Tseng, S. Y. Lin, H. M. Peng, C. S. Liao Telecommunication Laboratories,
More informationFirst Evaluation of a Rapid Time Transfer within the IGS Global Real-Time Network
First Evaluation of a Rapid Time Transfer within the IGS Global Real-Time Network Diego Orgiazzi, Patrizia Tavella, Giancarlo Cerretto Time and Frequency Metrology Department Istituto Elettrotecnico Nazionale
More informationUsing GNSS for optical frequency and wavelength measurements
Using GNSS for optical frequency and wavelength measurements Stephen Lea, Guilong Huang, Helen Margolis, and Patrick Gill National Physical Laboratory Teddington, Middlesex TW11 0LW, UK outline of talk
More informationRemote Frequency Calibration Service at NMIJ
Remote Frequency Calibration Service at NMIJ Case Example for APMP-WS 2014 Frequency Measurement Systems Section National Metrology Institute of Japan (NMIJ), AIST, JAPAN Content Introduction Overview
More informationOn Optimizing the Configuration of Time-Transfer Links Used to Generate TAI ABSTRACT I. INTRODUCTION
On Optimizing the Configuration of Time-Transfer Links Used to Generate TAI D. Matsakis 1*, F. Arias 2, 3, A. Bauch 4, J. Davis 5, T. Gotoh 6, M. Hosokawa 6, and D. Piester. 4 1 U.S. Naval Observatory
More informationTime transfer over a White Rabbit network
Time transfer over a White Rabbit network Namneet Kaur Florian Frank, Paul-Eric Pottie and Philip Tuckey 8 June 2017 FIRST-TF General Assembly, l'institut d'optique d'aquitaine, Talence. Outline A brief
More informationRecent Time and Frequency Transfer Activities at the Observatoire de Paris
Recent Time and Frequency Transfer Activities at the Observatoire de Paris J. Achkar, P. Uhrich, P. Merck, and D. Valat LNE-SYRTE Observatoire de Paris 61 avenue de l Observatoire, F-75014 Paris, France
More informationTime Comparisons by GPS C/A, GPS P3, GPS L3 and TWSTFT at KRISS
Time Comparisons by GPS C/A, GPS, GPS L3 and at KRISS Sung Hoon Yang, Chang Bok Lee, Young Kyu Lee Division of Optical Metrology Korea Research Institute of Standards and Science Daejeon, Republic of Korea
More informationUpgradation and Strengthening of National Time Scale of India
Upgradation and Strengthening of National Time Scale of India (ATF 2017) Ashish Agarwal, P. Thorat, M. P. Olaniya, S. Yadav, P. Kandpal, P. Arora, S. Panja, S. De, T. Bharadwaj, N. Sharma, S. Kazim, B.
More informationABSOLUTE CALIBRATION OF TIME RECEIVERS WITH DLR'S GPS/GALILEO HW SIMULATOR
ABSOLUTE CALIBRATION OF TIME RECEIVERS WITH DLR'S GPS/GALILEO HW SIMULATOR S. Thölert, U. Grunert, H. Denks, and J. Furthner German Aerospace Centre (DLR), Institute of Communications and Navigation, Oberpfaffenhofen,
More informationOptical Frequency Metrology with Combs and Lattice Clocks
AP-RASC, ATF2013, Taiwan 3 Sep. 2013 Optical Frequency Metrology with Combs and Lattice Clocks Feng-Lei Hong National Metrology Institute of Japan (NMIJ) National Institute of Advanced Industrial Science
More informationNational time scale UTC(SU): current status and perspectives
State Scientific Center of the Russian Federation National Research Institute for Physical-Technical and Radio Engineering Measurements National time scale UTC(SU): current status and perspectives A. Goncharov,
More informationTime and Frequency Transfer and Dissemination Methods Using Optical Fiber Network
Time and Transfer and Dissemination Methods Using Fiber Network Masaki Amemiya, Michito Imae, Yasuhisa Fujii, Tomonari Suzuyama, and Shin-ichi Ohshima Measurement Systems Section, National Metrology Institute
More informationTWO-WAY TIME TRANSFER WITH DUAL PSEUDO-RANDOM NOISE CODES
TWO-WAY TIME TRANSFER WITH DUAL PSEUDO-RANDOM NOISE CODES Tadahiro Gotoh and Jun Amagai National Institute of Information and Communications Technology 4-2-1, Nukui-Kita, Koganei, Tokyo 184-8795, Japan
More informationUVLBI MEMO #020 MASSACHUSETTS INSTITUTE OF TECHNOLOGY HAYSTACK OBSERVATORY
UVLBI MEMO #020 MASSACHUSETTS INSTITUTE OF TECHNOLOGY HAYSTACK OBSERVATORY To: UVLBI Group From: Alan E.E. Rogers Subject: Receiver for CSO 1] Introduction WESTFORD, MASSACHUSETTS 01886 June 2, 2010 Telephone:
More informationGPS CARRIER-PHASE TIME AND FREQUENCY TRANSFER WITH DIFFERENT VERSIONS OF PRECISE POINT POSITIONING SOFTWARE
GPS CARRIER-PHASE TIME AND FREQUENCY TRANSFER WITH DIFFERENT VERSIONS OF PRECISE POINT POSITIONING SOFTWARE T. Feldmann, D. Piester, A. Bauch Physikalisch-Technische Bundesanstalt (PTB) Braunschweig, Germany
More informationOn Optimizing the Configuration of Time-Transfer Links Used to Generate TAI. *Electronic Address:
On Optimizing the Configuration of Time-Transfer Links Used to Generate TAI D. Matsakis 1*, F. Arias 2 3, A. Bauch 4, J. Davis 5, T. Gotoh 6, M. Hosokawa 6, and D. Piester. 4 1 U.S. Naval Observatory (USNO),
More informationMULTI-GNSS TIME TRANSFER
MULTI-GNSS TIME TRANSFER P. DEFRAIGNE Royal Observatory of Belgium Avenue Circulaire, 3, 118-Brussels e-mail: p.defraigne@oma.be ABSTRACT. Measurements from Global Navigation Satellite Systems (GNSS) are
More informationPRECISE RECEIVER CLOCK OFFSET ESTIMATIONS ACCORDING TO EACH GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) TIMESCALES
ARTIFICIAL SATELLITES, Vol. 52, No. 4 DOI: 10.1515/arsa-2017-0009 PRECISE RECEIVER CLOCK OFFSET ESTIMATIONS ACCORDING TO EACH GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) TIMESCALES Thayathip Thongtan National
More informationFREQUENCY TRANSFER SYSTEM USING AN URBAN FIBER LINK FOR DIRECT COMPARISON OF SR OPTICAL LATTICE CLOCKS
FREQUENCY TRANSFER SYSTEM USING AN URBAN FIBER LINK FOR DIRECT COMPARISON OF SR OPTICAL LATTICE CLOCKS Motohiro Kumagai, Miho Fujieda, Hirokazu Hachisu, Shigeo Nagano, A. Yamaguchi, Clayton R. Locke, and
More informationStatus of the ACES mission
Moriond Workshop, March 2003 «Gravitational Waves and Experimental Gravity» Status of the ACES mission The ACES system The ACES payload : - space clocks : PHARAO and SHM - on-board comparisons - space-ground
More informationTIME TRANSFER THROUGH OPTICAL FIBERS (TTTOF): FIRST RESULTS OF CALIBRATED CLOCK COMPARISONS
TIME TRANSFER THROUGH OPTICAL FIBERS (TTTOF): FIRST RESULTS OF CALIBRATED CLOCK COMPARISONS Dirk Piester 1, Miho Fujieda 2, Michael Rost 1, and Andreas Bauch 1 1 Physikalisch-Technische Bundesanstalt (PTB)
More informationA Low-Noise 1542nm Laser Stabilized to an
A Low-Noise 1542nm Laser Stabilized to an Optical Cavity Rui Suo, Fang Fang and Tianchu Li Time and Frequency Division, National Institute of Metrology Background Narrow linewidth laser are crucial in
More informationRecent Calibrations of UTC(NIST) - UTC(USNO)
Recent Calibrations of UTC(NIST) - UTC(USNO) Victor Zhang 1, Thomas E. Parker 1, Russell Bumgarner 2, Jonathan Hirschauer 2, Angela McKinley 2, Stephen Mitchell 2, Ed Powers 2, Jim Skinner 2, and Demetrios
More informationAdvanced Ranging. and. Time & Frequency Transfer Techniques. for LISA. Noordwijk, The Netherlands, Jul 2004
Advanced Ranging and Time & Frequency Transfer Techniques for LISA Noordwijk, The Netherlands, 12 15 Jul 2004 Page 1 of 47 Wolfgang Schäfer TimeTech GmbH Phone: 0049-711-678 08-0 Curiestrasse 2 Fax: 0049-711-678
More informationTime and frequency transfer methods based on GNSS. LIANG Kun, National Institute of Metrology(NIM), China
Time and frequency transfer methods based on GNSS LIANG Kun, National Institute of Metrology(NIM), China Outline Remote time and frequency transfer GNSS time and frequency transfer methods Data and results
More informationHOW TO RECEIVE UTC AND HOW TO PROVE ACCURACY
HOW TO RECEIVE UTC AND HOW TO PROVE ACCURACY Marc Weiss, Ph.D. Independent Consultant to Booz Allen Hamilton Weiss_Marc@ne.bah.com Innovation center, Washington, D.C. JANUARY 23, 2018 HOW DO YOU GET UTC
More information