During the launch sequence, the TEL uses compressed gas to force the rocket out of the TLC. Once the rocket reaches a height of approximately 30 meters (the height of the top of the TLC in the vertical position), the first stage ignites. The time from first-stage ignition to spacecraft separation is approximately 15 minutes.
During the launch sequence, the TEL uses compressed gas to propel the rocket out of the TLC. Once the rocket reaches a height of roughly 30 meters (the height of the top of the TLC in its vertical position), the first stage ignites. The time from first-stage ignition to spacecraft separation is approximately 15 minutes.