Hailing the scientists of the Indian Space Research Organisation (ISRO) for ensuring the successful launch, he said the satellite will greatly benefit South Asia and the region's progress.
"Successful launch of South Asian Satellite is a historic moment. It opens up new horizons of engagement," Modi tweeted immediately after the GSLV-F09 carrying South Asia Communication Satellite lifted off from Sriharikota spaceport.
"I congratulate the team of scientists who worked hard for the successful launch of South Asia Satellite. We are very proud of them," he added.
Initially, it was to be named as 'SAARC Satellite' but its name was changed to South Asia Satellite after Pakistan refused to join the project.
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India, Nepal, Bangladesh, Bhutan, Sri Lanka, Maldives and Afghanistan are now part of the project.
"We are a united family of South Asian countries, united in our pursuit of peace, progress & prosperity of our region & the entire humankind," the Prime Minister said.
The satellite will provide a significant capability to each of the participating countries in terms of DTH, certain VSAT capacity plus linking among the states for both disaster information transfer and also in terms of library type of things.