Title :
Instrumental delay calibration for VLBI time comparison via short baseline interferometry
Author :
Kiuchi, H. ; Kaneko, A. ; Takahashi, Y. ; Yoshino, T. ; Hase, H. ; Schluter, W.
Author_Institution :
Commun. Res. Lab., Minist. of Posts & Telecommun., Tokyo, Japan
Abstract :
We have developed a short baseline interferometry (SBI) system with a directly controlled reference frequency for VLBI time comparison. SBI is a kind of portable clock method in order to calibrate the instrumental delay. Instrumental delay is an important factor in determining the accuracy of time-and-frequency comparisons.
Keywords :
Doppler shift; atomic clocks; calibration; delays; frequency standards; radiowave interferometry; synchronisation; time measurement; Doppler shift; VLBI time comparison; accuracy; directly controlled reference frequency; instrumental delay calibration; portable clock method; reference receiver; short baseline interferometry; time-and-frequency comparisons; zero baseline interferometry; Antenna measurements; Antenna theory; Calibration; Control systems; Delay effects; Frequency; Instruments; Interferometry; Propagation delay; Receiving antennas;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.700579
