The Voice Behind Chandrayaan-3 Countdown N.Valarmathi Passes Away

N Valarmathi, a dedicated scientist from the Indian Space Research Organisation (ISRO), passed away following a cardiac arrest. She was known for her significant contribution as the voice behind countdown announcements for rocket launches at Sriharikota. Her voice was last heard during the historic countdown announcement for the launch of Chandrayaan-3, which successfully made a landing on the Moon.

Chandrayaan-3’s launch took place from the Satish Dhawan Space Centre in Sriharikota on July 14, and this marked her final countdown announcement. Valarmathi’s role in these countdowns symbolizes her important part in India’s space endeavors.

About N.Valarmathi

N. Valarmathi was an Indian scientist and project director of RISAT-1, India’s first indigenously developed radar imaging satellite. She was born on July 31, 1959, and died on September 3, 2023, at the age of 64.

Valarmathi’s Career

  • Valarmathi joined the Indian Space Research Organisation (ISRO) in 1984.
  • She worked on a variety of projects, including the development of the INSAT satellite series and the PSLV launch vehicle.
  • She was the project director of RISAT-1, which was launched in 2012.
  • RISAT-1 is a radar imaging satellite that can be used for a variety of applications, including disaster management, agriculture, and border security.
  • She was the first person to receive the Abdul Kalam Award, instituted in 2015 by the Government of Tamil Nadu in honor of former President Abdul Kalam.

Valarmathi’s death was a major loss to the Indian space program. She was a brilliant scientist and a dedicated engineer. She will be remembered for her contributions to the development of India’s space capabilities.

About Chandrayaan-3

Chandrayaan-3 was launched on 14th July at 2:35 pm IST as scheduled, from Satish Dhawan Space Centre Second Launch Pad in Sriharikota, Andhra Pradesh. The spacecraft entered lunar orbit on 5 August 2023. The Rover named Pragyan successfully landed on the South Pole of the Moon on 23rd August.

  • It serves as a continuation of the Chandrayaan-2 mission.
  • The mission includes both a Lander and Rover configuration.
  • The launch was carried out by the LVM3 (GSLV Mk III) rocket which placed the integrated module in an Elliptic Parking Orbit (EPO) of size ~170 x 36500 km.
  • The propulsion module of Chandrayaan-3 will transport the Lander and Rover configuration to a lunar orbit of 100 kilometers.
  • The Chandrayaan-3 mission has been allocated a budget of ₹615 crore.


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