Sierra Space SDA AMDT3 Tracking Layer Satellites

Agency

Space Development Agency

Award ID

SDA AMDT3

Ceiling value

$798M

Vehicle

Firm-fixed-price Other Transaction Authority (OTA) prototype agreement

Awarded

2026-07-13

Period of performance ends

Undisclosed

• CompanySierra SpaceCommercial space systems including Dream Chaser spaceplane, habitats, and defense satellites.

• ProgramProliferated Warfighter Space ArchitectureSDA's tranche-based proliferated-LEO architecture for missile warning/tracking and resilient space-domain awareness.

What is the Sierra Space SDA AMDT3 Tracking Layer Satellites contract?

On July 13, 2026, the U.S. Space Development Agency awarded Sierra Space a firm-fixed-price Other Transaction Authority (OTA) prototype agreement worth up to $798 million to design, build, and deliver 18 missile-warning/tracking variant satellites across two orbital planes under the Accelerated Missile Defense Tranche 3 (AMDT3) program. Built on Sierra Space's Horizon spacecraft platform (part of its Eclipse Satellite Family, the same architecture used for SDA Tranche 2), the satellites expand the Tracking Layer of the Proliferated Warfighter Space Architecture (PWSA) supporting Golden Dome for America, with delivery/launch-readiness required by end of 2028. This award was part of a combined $1.75B SDA announcement covering both Sierra Space and L3Harris for 36 total AMDT3 satellites.

Which agency awarded the Sierra Space SDA AMDT3 Tracking Layer Satellites contract?

The Sierra Space SDA AMDT3 Tracking Layer Satellites contract was awarded by Space Development Agency under a Firm-fixed-price Other Transaction Authority (OTA) prototype agreement vehicle.

How much is the Sierra Space SDA AMDT3 Tracking Layer Satellites contract worth?

The Sierra Space SDA AMDT3 Tracking Layer Satellites contract has a value of $798M, awarded on 2026-07-13.

Each claim links to its underlying source. Confidence reflects how directly the source supports the claim.