> NASA uses dishes in the Deep-Space Network (DSN) to communicate with Voyager 1. These dishes, located around the globe in Goldstone, Canberra and Madrid, are optimized for these higher frequencies

Madrid Longitude: 4.3° W

Goldstone Longitude: 116.9­° W

Canberra Longitude: 149.0° E

153.3° from Madrid to Canberra and only 94.1° from Canberra to Goldstone. Bit of a slight to Western Australia to skip over the ~120° option and put the third dish in Canberra.