Radio Astronomy Department Head . The National Astronomy and Ionosphere Center (NAIC) is seeking exceptionally well-qualified applicants for the position of Radio Astronomy Department Head at the Arecibo Observatory in Arecibo , Puerto Rico . ... The Radio Astronomy Department at the Arecibo Observatory includes a staff of 15 researchers, postdocs and long-term visiting scientists. ... For further information about the NAIC Arecibo Observatory see http://www.naic.edu . ...
... 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. ...