ISRO scientist, voice behind launch countdowns, dies of cardiac arrest
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N Valarmathi, an Indian Space Research Organisation (ISRO) scientist and the voice behind the space agency's rocket launch countdowns, died due to cardiac arrest on Saturday in Chennai, reported WION. She was 64. Reportedly, Valarmathi's last countdown came when the Polar Satellite Launch Vehicle (PSLV-C56), carrying Singapore's DS-SAR and six co-passenger satellites, lifted off from Sriharikota's Satish Dhawan Space Centre on July 30.