... AFFECTED KEYWORDS : The affected keywords are: CRVAL2A and CRVAL3A (beam position on sky in RA/Dec) CRVAL2B and CRVAL3B (beam position on sky in Az/ZA) CRVAL2G and CRVAL3G (beam position on sky in l/b) CROFF2 and CROFF3 (map center offset in RA/Dec) CROFF2B and CROFF3B (map center offset in Az/ZA) BEAM_OFFRAJ and BEAM_OFFDECJ (total beam offset in RA/Dec) PARA_ANG (parallactic angle) SYMPTOMS All the above-mentioned ... The keywords are ENC_AZIMUTH and ENC_ELEVATIO. ...

... 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. ...