Porcas (MPIfR, Germany), Garrett (JIVE, Netherlands), Patnaik (Canada) & Nair (RRI, India) have attempted to make a ``definitive'' high-resolution study of the gravitational lens system, 2016+112, using an 18-station Global VLBI Array run at 5 GHz, including the Arecibo 305-m telescope. ... There are 3 image ``regions'' (A, B & C) spread over an area of 4 arcsec. Previous VLBI observations (e.g., Garrett et al., ... Arecibo-VLBA_Saint Croix baseline. The bandwidth is 16 MHz, the . ...

... 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. ...