Maximum delay in visibilities measured by a 100 m baseline for a given phase center location in the sky (H₀, δ₀). Left: Maximum delays, obtained by numerical maximization of Eq. (5) over H, δ, and θ. Right: Maximum delays expected from Eq. (9). The vertical dotted lines separate regimes where |δ₀ + ϕ|≤π/2 and |δ₀ + ϕ|> π/2. The slanted stripes indicate the regions where the phase center is below the physical horizon.