Notes. N_stations and N_correlations are the number of stations and the corresponding number of independent correlation measurements (computed as N_correlations = N_stations(N_stations − 1)/2 + N_stations). Autocorrelations were systematically flagged before imaging. UV_max is the largest radial distance in the (u,v) plane that limits the maximum theoretical resolution of the instrument. t_start and t_end observation times are in Universal Time (UT), providing a total number of time samples N_times at a time resolution δt. We considered only one frequency channel covering a bandwidth Δν centred on the frequency ν₀. All three datasets come in measurements sets that follow the NRAO standards. Dataset A has been generated for a one-hour synthetic zenith observation using mkant and makeMS routines that are part of the LOFAR software package. Dataset B comes from a LOFAR commissioning observation and is filled with simulated data. Dataset C contains actual calibrated data from a real LOFAR observation of Cygnus A.