"Congratulations to ISRO team on successful launch of PSLV-C33 carrying IRNSS-1G," the President wrote on micro-blogging site Twitter.
Lauding the scientists, Modi tweeted "with this successful launch, we will determine our own paths powered by our technology".
In his congratulatory message, Ansari said the "flawless launch" by ISRO scientists has "demonstrated India's capabilities in the space sector".
Railway Minister Suresh Prabhu said, "More big milestone for our country. ISRO makes us proud again. Congrats to all scientists for this feat. Leadership of @narendramodi inspires".
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Andhra Pradesh Chief Minister N Chandrababu Naidu hailed the launch of the PSLV-C33 carrying IRNSS-1G as another "proud moment for India".
"Hearty congratulations to @isro for launching IRNSS - 1G. Another proud moment for India," he wrote.
Madhya Pradesh Chief Minister Shivraj Singh Chouhan said, "Heartiest congratulations to @ISRO scientists on successfully launching seventh & the last satellite of IRNSS constellation 'IRNSS-1G'."
Rajasthan Chief Minister Vasundhara Raje said, "Heartiest Congratulations to @isro on launching IRNSS - 1G. #ProudIndian".