LIGO-India is a planned gravitational-wave detector to be built in India,
to complement LIGO in the US and other gravitational wave (GW) detectors worldwide.
Planning is by an Indian GW-astronomy consortium named INDIGO
(aka IndIGO)
for Indian Initiative in Gravitational-wave Observations).
The project was approved by the Indian government in 2016 and
received budget approval in 2023, with the aim of completion around
2030. Construction began in 2026, with 2030 completion considered
possible.
The presence of a number of such detectors around the world increases
their science-value, both to confirm GW detections and improving
their localization.