ISRO Puts Out Exhaustive Account of What Went Wrong with First Development Flight of SSLV
News 18The Indian Space Research Organisation on Wednesday gave a detailed account of what went wrong with the first development flight of the Small Satellite Launch Vehicle last year and why the mission could not be accomplished. “Subsequent detailed analysis of the flight events and observations ranging from countdown, lift-off, propulsion performance, stage separations and satellite injection revealed that there was a vibration disturbance for a short duration on the equipment bay deck during the SS2 separation, that affected the Inertial Navigation System, resulting in declaring the sensors faulty by the logic in Fault Detection and Isolation software,” ISRO said. The salvage mission mode got fully executed without the support of the accelerometer data and injected the satellite to an unstable orbit due to lower injection velocity. “SSLV-D1 mission demonstrated the satisfactory integrated performance of SSLV in all its systems including its flight through the aerodynamic regime, which is an accomplishment by itself,” the space agency added.