NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . Planetary . ... Information . ... Planetary Radar . ... Since the completion of the Arecibo upgrade, the new radar system has been used for a wide range of solar system studies. ... This instrument will enable the Observatory to detect asteroids over a very much wider radial range than with the old 420 kilowatt system. ... Description of the Arecibo Observatory Planetary radar . NSF Senior Review effects on the Planetary radar . ...

... 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. ...