Algonquin Radio Observatory
A radio observatory located near Lake Traverse, Ontario,
Canada. Its main instrument is a 46-meter (150-foot) fully steerable radio
telescope which has been in operation since 1966. The Algonquin Radio
Observatory (ARO) was used in the first successful very
long baseline interferometry (VLBI) experiment in 1967. It was also
used, by Alan Bridle and Paul Feldman in 1974, for the first SETI search to be carried out at the 1.35-centimeter wavelength, emitted by water
molecules in space.