Black and white image of the second 85-foot telescope
The NRAOs second 85-foot telescope came as a kit from the Blaw-Knox Corporation. It was ready for observation in February 1964 and paired with the Howard E. Tatel 85-foot telescope to form the NRAOs first array, the Green Bank Interferometer (GBI). The GBI was changeable, because this telescope had its own built-in wheels to allow it to be hauled it up and down a stretch of road leading from the Tatel. Changing the distance between the 85-footers changed the resolution of the arrays combined view: farther equals higher resolution.