SLC-4E

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Space Launch Complex 4 East is one of two launch pads at Space Launch Complex 4 at Vandenburg Space Force Base in California. SLC-4E saw its first launch supporting an Atlas-Agena D. 4E was used for Atlas launches between 1964 and 1968. In 1971, SLC-4E was repurposed as a launch site for Titan launch vehicles and was used as such until 2005. SpaceX began works on converting the site for Falcon 9 launches in 2011 with the first occurring in September 2013. Neighbouring site SLC-4W was also acquired by SpaceX and has since been converted into a landing site for Falcon 9 launches from SLC-4E (LZ-4). Since 2021, launch cadence from SLC-4E has increased rapidly as Starlink missions began from California in September 2021 and today is SpaceX’s second most active launch site.