Time & Frequency Laboratory

Introduction

NIMT is the national metrology institute established by National Metrology System Development Act., B.E. 2540 since June 1, 1998. NIMT is responsible for the establishment, maintenance and dissemination of the primary and national standards. The impedance laboratory is under the NIMT and it has the responsibility to maintain and disseminate the quantities of AC resistance, capacitance and inductance. The impedance laboratory supports calibrations and applications of impedance in electronics, communications, manufacturing, medical and other fields.

     Time keeping systems

     International time comparisons

     Optical clock: Ytterbium ion                         

     Time and frequency dissemination

Calibration services

Staff

Dr. Thayathip Thongtan

Metrologist, Senior Professional
Email : thayathip@nimt.or.th
Tel. : 02-5775100 Ext.1335

Area of research/expertise
- Time and frequency metrology
- GNSS time transfers

Dr. Piyaphat Phoonthong

Metrologist , Senior Professional
Email : piyaphat@nimt.or.th
Tel. : 02-5775100 Ext.1335

Area of research/expertise
- Time and frequency metrology
- Quantum metrology: atomic clock
- Atomic physics

Dr. Rattakorn Kaewuam

Metrologist, Practitioner
Email : rattakornk@nimt.or.th
Tel. : 02-5775100 Ext.1335

Area of research/expertise
- Quantum Metrology: Optical Atomic Clock
- Trapped Ion Technology
- Atomic Physics and Laser Cooling

Related publications/articles

Selected publications

  1. ] N. Niwasanon, T. Thongtan and C. Satirapod, “Performance assessment of network-based real time kinematic in Thailand: a case study on distributions of test points,” in Geoinfotech, Bangkok, 2019.
  2. T. Thongtan, “GNSS time and frequency transfers,” in Electrical Engineering Electronics, Computer, Telecommunications and Information Technology (ECTI) Conference on Application Research and Development, Nakhon Phanom, 2021.
  3. S. Chinnarat, T. Thongtan and J. Bairaksa, “GNSS active control point determinations,” in IEEE 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2021), Chiangmai, 2021.
  4. C. Paijitprapaporn, T. Thongtan and C. Satirapod, “Accuracy assessment of integrated GNSS measurements with LIDAR mobile mapping data in urban environments,” in IMEKO XXIII World congress (IMEKO2021) , Yokohama (Virtual), 2021.
  5. S. Kriengkraiwasin, C. Charoenphon, K. Butwong, V. Kovitpongkajorn, P. Yomwan, T. Thongtan and C. Satirapod, “Unification of GNSS CORS coordinates in Thailand,” Survey Review, vol. 53, no. 380 , p. 9, 2021.
  6. C. Laoniphon, T. Thongtan and C. Satirapod, “Performance assessments of correction models in GNSS network-based RTK positioning,” in IEEE 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2021), Chiangmai, 2021.
  7. C. Paijitprapaporn, T. Thongtan and C. Satirapod, “Accuracy assessment of integrated GNSS measurements with LIDAR mobile mapping data in,” Measurement: Sensors, vol. 18, no. 100078, p. 5, 2021.
  8. P. Saiyut, T. Thongtan, and J. Bairaksa, “Evaluating the accuracy of web-based maps within automatic web processing services,” 19th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), hybrid, 2022.
  9. C. Netthonglang, T. Jongrukchob, T. Thongtan, J. Bairaksa, “Real-time and online post-processing kinematic positioning services,” 19th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), hybrid, 2022.
  10. T. Thongtan, S. Sawatdiaree, C. Satirapod, “GNSS time and frequency transfers through national positioning, navigation and timing infrastructure,” Journal of Applied Geodesy, vol. 16, issue 2, page 123-130, De Gruyter, 2022.
  11. Wouters M. J., Marais E. L., Gupta A. S., Omar A. S. and Phoonthong P. (2019) The Open Traceable Time Platform : Open Source Software and Hardware for Dissemination of Traceable Time and Frequency," 2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC)., 1-2
  12. Phoonthong P, Mizuno M, Kido K, Shiga N (2014) Determination of the absolute Microwave frequency of laser-cooled 171Yb+ Appl. Phys. B, 117(2), 673-680
  13. Shiga N, Mizuno M, Kido K, Phoonthong P, Okada K (2014) Accelerating the averaging rate of atomic ensemble clock stability using atomic phase lock New J. Phys., 16, 073029
Post Views: 667