Rocket Lab(@RocketLab):We’ve successfully passed our Preliminary Design Review (PDR) for the 18 satellites we're building for @SemperCitiusSDA's Tracking Layer Tranche 3 (TRKT3) constellation. A big step forward in delivering advanced missile warning & defense capabilities for the U.S. and its allies.

Rocket Lab

@RocketLab

Official account for Rocket Lab, the end-to-end space company. We build rockets and spacecraft that open access to space to improve life on Earth.

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Rocket Lab@RocketLab

2026.09.03 22:00

We’ve successfully passed our Preliminary Design Review (PDR) for the 18 satellites we're building for @SemperCitiusSDA's Tracking Layer Tranche 3 (TRKT3) constellation. A big step forward in delivering advanced missile warning & defense capabilities for the U.S. and its allies.