Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ptti.nasa..599t&link_type=abstract
In NASA. Goddard Space Flight Center Proc. of the 11th Ann. Precise Time and Time Interval (PTTI) Appl. and Planning Meeting
Astronomy and Astrophysics
Astronomy
Atomic Clocks, Point Sources, Radio Interferometers, Radio Sources (Astronomy), Synchronism, Very Long Base Interferometry, Bandwidth, Brightness, Errors, Radio Signals, Resolution, Time Lag
Scientific paper
Radio interferometry has the potential of synchronizing clocks across intercontinental distances with accuracies better than one nanosecond. One of the potential error sources in such determinations is the spatial structure of the natural radio sources that provide the reference signals. Due to their extent, the effective position of these sources can vary as a function of the length and orientation of the baseline vector joining the two antennas. If they are not corrected, such variations can lead to errors in clock synchronization. The theory of structure corrections is presented and specific examples are given to illustrate the nature and size of the effect.
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