"We should not be too discouraged. India was trying to do something very, very difficult. In fact, everything was going as planned as the lander came down," Linenger told PTI in an email interview.
Linenger noted that the lander "unfortunately" never quite made it to the hover point which is an altitude of about 400 metres above the lunar surface.
"...if it had made it to that point, and even if it had not succeeded beyond that, it would have been helpful because the radar altimeters and lasers could have been tested. But if you step back and look at the big picture, this (attempt) would obviously be very helpful for follow on missions," he said.
An astronaut narrator and space analyst, Linenger said overall the mission has been very successful.
In fact, the orbiter will continue to downlink very valuable information for the next year. And by all indications, all systems are good on the orbiter, he said.
Leninger also congratulated ISRO for attempting the difficult lunar landing.
I look forward to watching complete success in the future based upon lessons learned from this bold attempt, Linenger added.
The Chandrayaan-2 mission was launched on July 22 by a Geosynchronous Satellite Launch Vehicle Mark III (GSLV Mk III).
The Chandrayaan-2 spacecraft began its journey towards the Moon, leaving the Earth's orbit, on August 14, after a crucial manoeuvre called Trans Lunar Insertion or TLI that was carried out by Isro to place the spacecraft on "lunar transfer trajectory".
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