amardeep mishra
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Hi @saltyashellApples and oranges. India cant launch 5 mt sats atm. Its all in the future.
5t payload capacity is now very much within the reach of ISRO. As far as the credible engineering evidences go, ISRO can very easily optimize the GSLV mk3 from 4t to 5t without even using SCE-- these changes involve structural modifications, using lighter materials etc etc. This can be done much earlier than you're expecting. SCE, however will take 2-3 more years for any kind of test trial.