Nervous and anxious for sure but the city-headquartered space agency is cautiously optimistic of "Vikram" module's soft-landing on the Lunar surface planned in the early hours of Saturday.
According to ISRO officials, Earth bound orbit is a phase during which the spacecraft will remain in the Earth's sphere of influence.
The ISRO had apparently suspended those operations 10 days ago following night fall on the Moon.
Asked if the lander was 'damaged' during the 'hard landing", Sivan said: "That we do not know".
The Rs 978 crore mission, which has been rescheduled for Monday after scientists corrected the glitch in the rocket, will be launched at 2.43 p.m from the second launchpad at Satish Dhawan Space Centre, over 100 km from Chennai.
'Vikram' with rover 'Pragyaan' housed inside is scheduled for a powered-descent between 1 am and 2 am on September 7, followed by its touchdown between 1.30 am and 2.30 am.
All spacecraft parameters are normal, the Bengaluru headquartered space agency said after the maneuver on the spacecraft.
'The unflappable temperament and nerves of steel under extreme pressure -- essential ingredients in space research -- were on full display in the rows occupied by the scientists still engrossed in their monitor screens,' says Minnie Vaid, author of Those Magnificent Women And Their Flying Machines, ISRO's Mission to Mars.
There will be two more orbit manoeuvres to make the spacecraft enter into its final orbit passing over the lunar poles at a distance of about 100 km from the Moon's surface.
All spacecraft parameters are normal, the Bengaluru headquartered space agency said after the maneuver.
India's second mission to the moon will be launched on Monday at 2.43 pm after its initial launch on July 15 was called off owing to a "technical glitch."
'When you look at it from the point of view of science, Chandrayaan 2 is a big success.'
The year ended with the launch of the PSLV's 50th mission.
The ISRO is aiming for a soft landing of the lander in the South Pole region of the moon where no country has gone so far.
"The duration of manoeuvre was 1,738 seconds. With this, Chandrayaan-2 was successfully inserted into a Lunar orbit," Indian Space Research Organisation said.
Late on Monday night, in a last-minute revision of schedule, ISRO announced that the launch of India's second lunar mission 'Chandrayaan-2' has been called off due to a technical snag.
Veteran space scientist G Madhavan Nair said on Tuesday that Indian Space Research Organisation's unsuccessful bid to soft land on the moon is nothing to be alarmed about, and it would only enable the space agency master complex missions going forward.
The Chandrayaan-2 spacecraft is expected to reach the moon's orbit on August 20 and land on lunar surface on September 7.
The PM asserted that 'we know how to take challenges head-on'.
Nirmala Sitharaman, Amit Shah, Arvind Kejriwal and Rahul Gandhi also expressed solidarity with ISRO.
Indian Space Research Organisation's plan to soft land Chandrayaan-2's Vikram module on the Lunar surface did not go as per script in the early hours of Saturday, with the lander losing communication with ground stations during its final descent.
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