GPS III SV-10 'Hedy Lamarr' Scrubbed April 20 — Falcon 9 Targets April 21 for Final GPS III Launch

SpaceX's planned April 20, 2026 launch of GPS III Space Vehicle 10 from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station, Florida was scrubbed from its 2:57 a.m. EDT (06:57 UTC) window and rescheduled for April 21, 2026 at 2:53 a.m. EDT (06:53 UTC). The GPS III SV-10 satellite — officially named 'Hedy Lamarr' by the U.S. Space Force in honor of the actress and inventor who co-developed frequency-hopping spread spectrum, the foundational technology underlying modern CDMA signals and GPS architecture — is the 10th and final spacecraft in the advanced GPS III constellation built by Lockheed Martin. GPS III satellites deliver 3x the positional accuracy and 8x the anti-jam resistance of the legacy GPS Block IIF generation. Falcon 9 first stage B1095, on its 7th flight (previously flown March 14, 2026), is assigned for an Atlantic Ocean recovery aboard drone ship 'Just Read the Instructions' (JRTI) approximately 8.5 minutes after liftoff. The payload will be deployed to medium Earth orbit (MEO) at approximately 20,200 km altitude, joining the nine previously launched GPS III satellites in a constellation that has been under construction since the first GPS III satellite launched in December 2018. Completion of the GPS III constellation represents a generational upgrade to U.S. military and civilian positioning, navigation, and timing infrastructure. This mission would be SpaceX's 49th orbital launch of 2026, one day after the company's 600th cumulative Falcon booster landing milestone.