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Abstract New method has been developed for correcting the instrumental phase drifts that occur in disconnected radio interferometry. In addition to receiving the celestial radio signals, each element of the interferometer receives signals from a common ground-based VHF transmitter using receivers locked in phase with the astronomical receivers. The ground-based transmitter acts as a phase reference, its signals are used at the processing stage to correct the phase drifts in the astronomical channels to within a few degrees over an unlimited period. The uses and limitations of the method in radio astronomy and the beneficial effects of small quantities of noise in the reference signals are discussed.
|Glasgow Author(s):||Woan, Prof Graham|
|Authors:||Woan, G., and Dufflett-Smith, P.J.|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Astronomy and Astrophysics|