The powerful voice behind ISRO's rocket launches has now passed away. N. Valarmathi was a member of the Range Operations Programme Office. How did she become the voice of ISRO's launches? Molly Gambhir tells you more.

Gravitas: N. Valarmathi, the voice of ISRO's countdowns passes away

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Gravitas: N. Valarmathi, the voice of ISRO's countdowns passes away