Title :
A new approach for steering UTC(KRIS)
Author :
Lee, Seung Woo ; Lee, Chang Bok ; Yang, Sung Hoon
Author_Institution :
Div. of Phys. Metrol., Korea Res. Inst. of Stand. & Sci. (KRISS), Daejeon
Abstract :
This paper describes development of a steering strategy that is intended for improving the stability of UTC(KRIS). The resultant time scale is realized by steering an active H-maser via carrier-phase (CP) GPS time transfer. Emphasis is placed on the fact that a real-time GPS CP time transfer is utilized to compute the time difference between the time scale and GPS time. The Kalman estimator is utilized to form a Linear Quadratic Gaussian (LQG) controller. The relative performance assessment is conducted in terms of the frequency predictability and time instability by comparing against the current time scale of UTC(KRIS).
Keywords :
frequency measurement; linear quadratic Gaussian control; masers; time measurement; Kalman estimator; active H-maser; carrier-phase GPS time transfer; linear quadratic Gaussian controller; steering strategy; time instability; Clocks; Distributed amplifiers; Frequency estimation; Global Positioning System; Metrology; Optimal control; Pulse amplifiers; Radiofrequency amplifiers; Stability; Steering systems;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574783