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Start Date:1965-05-20 End Date:1965-05-23 Location:Green Bank, WV People:von Hoerner, Sebastian |
Creator:Records of the NRAO Series:Photographs Series Unit:140 Foot Telescope Unit Type:Still Image Subject:Instruments--140 Foot Telescope |
Description:Although construction on the 140 Foot telescope was "completed" in February 1965, NRAO staff still had electronics and other work to do before it was fully operable, and the telescope was not dedicated until October of 1965. However, on 23 May 1965, Sebastian von Hoerner made the first observations with the 140 Foot, measuring occultations of radio sources by the Moon at 234, 256 and 405 Mc. He said, "An occultation of a radio source by the Moon occurs only at a very specific time. If you miss it and want to repeat it, you must wait the 19 years through a lunar cycle. In May 1965, a good occultation was just coming up. I wanted to grab it, and I did." The photo shows ongoing work on the telescope on 20 May 1965, with a thumbnail inset of von Hoerner.
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