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7.2.1 Bandpass measurement

Bandpass calibration usually relies on observing a very strong source for some time; the bandpass functions are obtained by normalizing the observed visibility spectra by their integral over frequency. It is a priori not necessary to observe a point source, as long as its visibility can be assumed to be, on all baselines, independent on frequency in the useful bandwidth. If there is some dependence on frequency, then one should take this into account.



S.Guilloteau
2000-01-19