The 18th Space Defense Squadron (18 SDS), a component of Space Delta 2, is the U.S. Space Force’s premier Space Domain Awareness squadron and provides and advances a continuous, comprehensive, and combat-relevant understanding of the space situation. The squadron is located at Vandenberg Space Force Base (SFB), California, and executes command and control of the U.S. Space Surveillance Network (SSN) – a global collection of ground and space-based sensors that track all man-made objects in Earth’s orbit.