The Skylab Command Van and associated UHF (circular polarization) Command Antenna in early 1973.
In 1973, Skylab was launched from the Kennedy Space
Inside the van was a huge Klystron, which provided a high powered UHF uplink signal to the orbiting spacecraft. During passes, commands were sent from this van to Skylab.
Photo: John Berry.
The Skylab Teltrac (receive) antenna is visbile at far right – behind the microwave tower.
Photo: Hamish Lindsay.