The move by the Indian Space Research Organisation (ISRO) comes after the non-separation of the heat shield of the PSLV-XL rocket that was launched on Aug 31, 2017, resulting in failure of the mission. “We are not tense about the upcoming December rocket launch after the failure of the previous mission. While the study as to the cause of failure of the earlier rocket is on, we have increased the robustness of the next rocket,” K. Sivan, Director, Vikram Sarabhai Space Centre, told IANS. As a result of the failure, the vigation satellite IRNSS-1H could not be put into orbit. The satellite was a substitute for IRNSS-1A that is facing some technical problems.