A new, longer video of yesterday’s attempted Falcon 9 landing has just been released by SpaceX.
In the high-quality video, the final seconds of the Falcon 9′s flight are captured - including approach to the Autonomous Spaceport Drone Ship, settling on its surface and eventual explosion.
About 250 feet above the ASDS, the rocket’s four landing legs are deployed while a single Merlin 1D engine performs the final breaking burn. As the rocket approaches the platform, nitrogen thrusters at the very top of the stage help stabilize the final approach.
However, overcompensation of the Merlin engine on final approach caused excessive lateral velocity, which ultimately tipped the rocket over after contacting the platform’s surface. A single nitrogen thruster tried to provide thrust to keep the rocket vertical, but to no avail.
The vehicle then exploded, sending rocket components hurtling into the air, into the ocean, and across the surface of the barge.
Late yesterday, Elon Musk stated that the failed landing was caused by "stiction in the biprop throttle valve, resulting in control system phase lag.” This means that the first stage engine was unable to make corrections as fast as the stage’s landing control system computer could determine them.
For the initial video released by SpaceX, which cuts off at the moment of barge contact, click here.