Left picture: U.S. radio astronomer Martha Stahr Carpenter (Cornell University) with some of the instrumentation in the receiver hut of the 11m (36 ft) antenna at Potts Hill , during a visit to the CSIRO Radiophysics Laboratory. – (The picture was taken in 1955; caption thanks to Wayne Orchiston, Miller Goss and Jessica Chapman).

Right picture: Ruby Payne-Scott , Alec Little (middle) and “Chris” Christiansen at the Potts Hill Reservoir Division of Radiophysics field station in about 1948. Payne-Scott and Little were working on observations of the Sun at 97 MHz using the newly constructed swept-lobe interferometer.

Image Credit: CSIRO Radio Astronomy Image Archive.