The Very Long Baseline Array (VLBA) is an Interferometer consisting of 10 25 meter Radio Telescopes spread across North America from Hawaii to the Virgin Islands. Its control room is in Socorro, New Mexico. It observes Wavelengths from 28 cm to 3 mm in eight Bands plus two narrow longer-wavelength bands.
Mauna Kea Observatories (MKO)
National Radio Astronomy Observatory (NRAO)
Owens Valley Radio Observatory (OVRO)