Intercontinental comparison of optical atomic clocks through very long baseline interferometry
نویسندگان
چکیده
منابع مشابه
Very Long Baseline Interferometry and the VLBAASP
Phase-referencing allows phase calibration of VLBI data. Using regular observations of a nearby calibrator source, delay, delay-rate, and phase corrections can be derived and their eeects removed from the target source visibility data. This technique allows imaging much weaker objects than is possible via fringe-tting methods. We examine the main types of phase error in VLBI observations (geome...
متن کاملGeodetic Very Long Baseline Interferometry (VLBI) :
A brief Note compiled by: Prof. Madhav N. Kulkarni, IIT Bombay Since the inception of the Very Long Baseline Interferometry (VLBI) system in 1967, this radio interferometry technique has revolutionised the fields of geodesy, geodynamics and astrometry. With the unprecedented precision and resolution made possible by VLBI various tasks such as geodetic positioning, reference frames interconnect...
متن کاملVery Long Baseline Interferometry and the VLBAASP
The special problems encountered when performing spectral-line VLBI observations are discussed in this Chapter. In particular, the usefulness of Fourier transforming measured visibility data with respect to time, delay or frequency for purposes of fringe detection and calibration is clariied.
متن کاملPerspective of long baseline optical interferometry
This article is a sort of sequel of the earlier extensive review by Saha (1999a) where emphasis was laid down on the ground based single aperture, as well as on the working long baseline optical interferometers (LBI) situated at the various observatories across the globe that are producing a large amount of astronomical results. Since the future of high resolution astronomy lies with the new ge...
متن کاملModeling of Nutation-Precession: Very long baseline interferometry results
Analysis of over 20 years of very long baseline interferometry data (VLBI) yields estimates of the coefficients of the nutation series with standard deviations ranging from 5 micro-arc-seconds (mas) for the terms with periods less than 400-days to 38 mas for the longest period terms. The largest deviations between the VLBI estimates of the amplitudes of terms in the nutation series and the theo...
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ژورنال
عنوان ژورنال: Nature Physics
سال: 2020
ISSN: 1745-2473,1745-2481
DOI: 10.1038/s41567-020-01038-6