Title :
Instrumental delay calibration with zero baseline interferometry for VLBI time comparison
Author :
Kiuchi, H. ; Hama, S. ; Amagai, J. ; Yoshino, Tomonobu ; Imae, M.
Author_Institution :
Commun. Res. Lab., Minist. of Posts & Telecommun., Koganei, Japan
fDate :
7/1/1997 12:00:00 AM
Abstract :
A highly accurate zero baseline interferometry (ZBI) method for measuring the instrumental delay in VLBI time comparisons has been developed. ZBI is a kind of portable clock method but adds a separately calibratable portable receiver as a reference. Instrumental delay is an important factor in determining the accuracy of time-and-frequency comparisons. Fundamental experiments using the ZBI method show a measuring accuracy of closer than 0.2 ns
Keywords :
atomic clocks; calibration; delays; radiowave interferometry; synchronisation; VLBI time comparison; instrumental delay calibration; portable clock method; separately calibratable portable receiver; synchronisation; time transfer; time-and-frequency comparisons; zero baseline interferometry;
Journal_Title :
Science, Measurement and Technology, IEE Proceedings -
DOI :
10.1049/ip-smt:19971200
