Green Bank 300ft Telescope

The previous primary telescope at Green Bank Observatory (GBO) was a 300-foot-dish radio telescope, now commonly referred to as the Green Bank 300ft (Radio) Telescope, the Green Bank 91m Telescope, the Green Bank 90m Telescope, or GB300. It went into service in 1962 and collapsed in 1988, and the current Green Bank Telescope (GBT) replaced it. The Green Bank 6-cm Radio Source Catalog radio astronomical survey, now considered basic, was carried out on it.