The National Astronomy and Ionosphere Center (NAIC) is seeking an exceptionally well-qualified applicant for a position as a Research Associate or Senior Research Associate in radio astronomy at the Arecibo Observatory in Arecibo, Puerto Rico. ... A relocation allowance is provided. ... Staff Research Associates are appointed for a three-year period and may be reappointed for an additional three years, at which time promotion to Senior Research Associate may be considered. ...

... 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. ...