The National Astronomy and Ionosphere Center/Arecibo Observatory is seeking a programmer for the astronomy (radio and radar) program. Under general supervision, develop, maintain, and document spectral line data reduction and analysis software for astronomical research at the Arecibo Observatory. ... The National Astronomy and Ionosphere Center/Arecibo Observatory is operated by Cornell University under a cooperative agreement with the U.S. National Science Foundation. ... Arecibo Observatory . ...

... 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. ...