The new generation of large-scale 21cm line synthesis surveys of the Milky Way allows a much more detailed examination of our galaxy's structure than ever before. We are using the high angular resolution and wide-field coverage of the Canadian Galactic Plane Survey to investigate the neutral hydrogen (H I ) structure in the vicinity of the Galactic midplane. 13 sample slices through the CGPS H I data (2003 January 14) . ... Gibson, S. J., & Stil, J. M. (2003 January AAS) . ... Steven Gibson . ...

... 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. ...