Radar Astronomy Group . ... This instrument will enable the Observatory to detect asteroids over a very much wider radial range than with the old 420 kilowatt system. ... Here are some recent images of asteroids obtained with the Arecibo Planetary Radar. ... The following data were taken by various observers using the Arecibo Observatory 12.6 cm radar. ... Chris De Vries wrote a description of how to reduce planetary radar data , using the 1988 Venus data taken at the Arecibo Observatory as a model. ...

... 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. ...