Testing the new 42-foot
The 42-foot portable radio telescope (right) working next to the permanent 40-foot telescope at Green Bank, West Virginia. From 1967 through 1976, the 42-foot served as the fourth, remote member of the Green Bank Interferometer (GBI), the test array for the Very Large Array (VLA). The 42-foot’s trailer carried the dish as stacked panels and included a built-in, donut-shaped drive and a small control room.
Credit: NRAO/AUI/NSF
