Title :
A delay calibration system for two-way satellite time and frequency transfer
Author :
Ascarrunz, F.G. ; Jefferts, S.R. ; Parker, T.E.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
We describe a system used to calibrate delays in two-way satellite time and frequency transfer (TWSTFT) Earth stations. The calibration system is designed to measure the transmit TX(t) and receive RX(t) delays through the Earth station in real time allowing for the possibility of real-time correction of TWSTFT data. The delay calibration device is stabilized to a temperature of 45±3° C. The measured peak-to-peak delay noise of the calibration device in loop-back operation with no common mode cancellation of delay errors is 800 ps. The time stability is on the order of 100 ps out to an averaging time of 3 days
Keywords :
calibration; delays; frequency standards; satellite ground stations; time measurement; transfer standards; 100 ps; 3 d; 42 to 48 C; 800 ps; Earth station; Earth stations; NIST; TWSTFT; delay calibration; delay errors; frequency transfer; loop-back operation; peak-to-peak delay noise; real time; receive delay; time stability; time transfer; transmit delays; two-way satellite; Calibration; Delay effects; Delay systems; Frequency; Noise cancellation; Noise measurement; Real time systems; Satellite ground stations; Stability; Temperature;
Conference_Titel :
Frequency Control Symposium, 1998. Proceedings of the 1998 IEEE International
Conference_Location :
Pasadena, CA
Print_ISBN :
0-7803-4373-5
DOI :
10.1109/FREQ.1998.717912
