the Falcon 1 rocket successfully flew on 28 September 2008, delivering a 165-kilogram (363-pound) non-functional boilerplate spacecraft into low Earth orbit. It was Falcon 1's first successful launch and the first successful orbital launch of any privately funded and developed, fully liquid-propelled carrier rocket. The launch occurred from Omelek Island, part of the Kwajalein Atoll in the Marshall Islands. Liftoff occurred at 23:15 UTC on 28 September 15 minutes into a 5-hour launch window. If the launch had been scrubbed, it could have been conducted during the same window until 1 October. 9 minutes 31 seconds after launch, the second-stage engine shut down, after the vehicle reached orbit. The initial orbit was reported to be about 330 × 650 km. Following a coast period, the second stage restarted and performed a successful second burn, resulting in a final orbit of 621 × 643 km × 9.35°. The rocket followed the same trajectory as the previous flight, which failed to place the Trailblazer, NanoSail-D, PRESat and Celestis Explorers spacecraft into orbit. No major changes were made to the rocket, other than increasing the time between first-stage burnout and second-stage separation. This minor change addressed the failure seen on the previous flight, recontact between the first and second stages, by dissipating residual thrust in the first-stage engine before separating them. Ratsat and the attached second stage are still in orbit as of 2021. Fifth flight SpaceX announced that it had completed construction of the fifth Falcon 1 rocket and was transporting the vehicle to the Kwajalein Atoll launch complex where it was to be launched on 21 April 2009, which would be 20 April 2009 in the United States. Less than a week before the scheduled launch date, Malaysian news reported that unsafe vibration levels had been detected in the rocket and repairs were expected to take about six weeks. On 20 April 2009, SpaceX announced in a press release that the launch had been postponed because of a potential compatibility issue between the RazakSAT spacecraft and the Falcon 1 launch vehicle. A concern had been identified regarding the potential impact of predicted vehicle environments on the satellite. On 1 June, SpaceX announced that the next launch window would open Monday, 13 July and extend through Tuesday, 14 July, with a daily window to open at 21:00 UTC (09:00 local time). The launch on Monday, 13 July was successful, placing RazakSAT into