List of astronomical interferometers at visible and infrared wavelengths Current performance of ground-based interferometers Current Performance of Existing Astronomical Interferometers

| Interferometer_and_observing_mode | Waveband | Limiting_magnitude | Minimum_baseline_m_un_projected | Maximum_baseline_m | Approx_no_visibility_measurements_per_year_measurements_per_night_x_nights_used_per_year | Max_ratio_of_no_phase_no_amplitude_measurements_measure_of_imaging_performance_0_is_none | Accuracy_of_amplitude2_measurements | Accuracy_of_phase_measurements_milli_radians | Number_of_spectral_channels_max_in_use_simultaneously | Comments_ |
|---|---|---|---|---|---|---|---|---|---|---|
| VLTI , +ATs VINCI | K | Never checked | 12 | 200 | 400 | 0 | >1% | - | 1 | Longest overall VLTI Baseline 130m |
| VLTI , +UTs MIDI | N | 4.5 | 46 | 130 | 200 | 0 | 10% | - | 250 | Used for a few weeks per year. Longest overall VLTI Baseline 130m |
| VLTI , +ATs MIDI | N | 4.5 | ? | 200 | 200 | 0 | 10% | - | 250 | VLTI inldes World`s largest unfilled apertures (siderostats, 1.8-m, 8-m). Longest overall VLTI Baseline 130m |