ISRO is going through key data sets to ascertain Vikram's landing fate. Only 5 per cent of the mission has been lost - the lander (Vikram), and Pragyan, the rover. The remaining 95 per cent, that is the Chandrayaan 2 orbiter, is orbiting the moon successfully.
Former ISRO director D Sasikumar told ANI that the communication line between the lander and the orbiter was still on. The communication data which is missing is being analysed for divergence. It would help the scientists at ISRO unravel the fate in the 15 minutes to landing.
In an official communication, ISRO said Vikram's descent was as planned and a "normal performance" was observed up to an altitude of 2.1 km. Subsequently, communication from lander to the ground stations was lost.
Vikram and Pragyan, together, were expected to last at least one lunar day, or 14 Earth days, on the moon’s surface. It is in these 14 Earth days, the duo could have given insights on the lunar surface.
Chandrayaan will try to establish contact with the lander and locate its landing site while in orbit.
The 2,379-kg orbiter carries eight scientific payloads for mapping the lunar surface and study the exosphere (outer atmosphere) of the Moon. The lunar south pole is believed to have deposits of water ice, a resource invaluable for future human settlements on the moon.
ISRO plans to send astronauts to space by 2022; an Orbiter mission to Mars between 2022 and 2023; another mission to Moon -- Chandrayaan-3 -- in late 2020s; Venus mission in 2023; Mission for Sun and will build a space station.
ISRO's plan to soft land Vikram on the lunar surface did not go as per script.
Final phase of "terrifying 15 minute" landing process was going on well till the rough braking phase.
Vikram's normal performance was observed up to an altitude of 2.1 km. Subsequently, communication from the lander to ground stations was lost.
India's Geosynchronous Satellite Launch Vehicle, GSLV MkIII-M1 successfully launched the 3,840-kg Chandrayaan-2 spacecraft into the Earth's orbit on July 22.
The spacecraft began its journey towards the moon leaving the earth's orbit in the dark hours on August 14
The spacecraft successfully entered the lunar orbit on August 20 by performing Lunar Orbit Insertion (LOI) manoeuvre.
On September 2, Vikram successfully separated from the orbiter, following which two de-orbiting manoeuvres were performed to bring the lander closer to the Moon.
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