NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... Dr. Herbert C. Carlson joined the USTAR Space Weather Center from at the European Office of Aerospace Research and Development, EOARD, London UK, where as Senior Scientist he engaged leading European research groups with US researchers across the research spectrum of the Air Force Research Laboratory. ... The Arecibo Observatory is the worldтАЩs most sensitive incoherent scatter research radar, and as such has many unique capabilities. ...
... 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. ...