L3Harris says 18 Tranche 3 satellites advance toward orbit to deliver near-continuous global missile warning and tracking for United States

L3Harris has reported that 18 Tranche 3 satellites under the Space Development Agency's missile warning and tracking layer are advancing toward orbit, intended to deliver near-continuous global coverage for US missile defence. The Tranche 3 constellation represents a significant expansion of the SDA's proliferated low-Earth-orbit architecture, building on earlier tranches to close gaps in persistent hypersonic and ballistic missile detection. Baseline designs for the satellites have received programme approval, according to supporting reporting, clearing the path toward production and launch.