Maximum delay in visibilities measured by a 100 m baseline, for a given phase center declination, assuming a full synthesis. Left: maximum delay as a function of declination of the phase center δ₀, obtained by numerical maximization of Eq. (5) over H, δ, H₀, θ (black dots), the maximum delays predicted by the partial equation (Eq. (7): blue dashed line) and those predicted by the full equation (Eq. (8): red solid line). Right: values of H, δ, and H₀ at the maximum. The vertical dotted lines separate regimes where |δ₀ + ϕ|≤π/2 and |δ₀ + ϕ|> π/2.