With the Square Kilometre Array planned to begin observations in around a decade and large neutral hydrogen multibeam surveys currently underway at Arecibo, the question of what we can learn about the evolution of galaxies through neutral hydrogen observations is very timely. ... Robert Minchin (NAIC, chair) . Emmanuel Momjian (NRAO) . ... Robert Minchin (co-chair) . Emmanuel Momjian (co-chair) . ... R. Minchin & E. Momjian ...
... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...