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Finishing the Westerbork Upgrade

It has been said that there is “no radio telescope in the world that is operating at its original design frequency and design specifications”. That will become very true for the Westerbork Synthesis Radio Telescope (WSRT) after the end-to-end Upgrade will be completed in the Fall of 2002. The Westerbork telescope was the brainchild of Professor Jan Oort, who realized that after the “large” Dwingeloo Telescope was completed in 1956, an interferometer operating at 21-cm would represent a great step forward for radio astronomy. The WSRT was constructed in the period 1967-1968 and has made many contributions to galactic and extra-galactic research. For an historical account of the Dwingeloo and Westerbork telescopes I refer to Raimond & Genee (eds.) "The Westerbork Observatory, Continuing Adventure in Radio Astronomy", Kluwer (1996).