For radio astronomy data engineers, SKA infrastructure teams, VLBI correlator architects, and anyone building distributed signal synthesis pipelines at exabyte scale. The Number You Already Know If you work in radio interferometry, you already know this number: Baselines = N(N-1)/2 For the Event Horizon Telescope's 8 stations: 28 baselines. For SKA-Mid's 197 dishes: 19,306 baselines. For SKA