NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Science . Astronomy . ... Visitor Center . ... Kick-Off Ceremony of the Arecibo Observatory 50th Anniversary . ... Scientists, Engineers and Staff from the Arecibo Observatory participated as judges in the High School Science Fair at Colegio Nuestra Se†‘ora del Carmen in Hatillo, Puerto Rico. The following members of the Arecibo Observatory participated in the evaluation of the scientific posters: . ...
... 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. ...