Space Force Prepares to Spend Billions More on Its Multibillion-Dollar Missile Defense System

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It's been four years since the U.S. Space Force (or more precisely, the Space Development Agency within USSF) announced it was building a new missile defense system out of concentric planes of orbiting "tracking" and "transport" satellites. Since then, it's only launched 27 satellites -- roughly 6% of the 477 it wants.

This slow start isn't discouraging Space Force from awarding even more contracts, however.

To date, the Proliferated Warfighter Space Architecture, or PWSA, program has awarded contracts for just under 500 satellites to be deployed through "tranches" numbered 0 through 2. Tranche 0 satellites are mostly all deployed now, and Tranche 1 launches should begin next year, with Tranche 2 to follow in 2026.

Before the vast majority of those satellites even launch though, Space Force invited America's space companies last week to begin preparing bids for a third tranche of PWSA satellites, which could grow the fleet to nearly 700 satellites. (The number will then begin trending down, as Tranche 0 and 1 satellites begin to age out of service and are removed from orbit.)

As SpaceNews reported last week, Space Force plans to begin accepting bids on Tranche 3 next year. Judging from past tranches, this promises to be a sizable contract -- probably on the order of $4 billion or more -- and with multiple winners.

Flock of satellites circling Earth.
Image source: Getty Images.

Building a missile defense system will be a step-by-step process

Tranche 0: PWSA began with the Tranche 0 satellites that started launching in April 2023. In total, it includes 20 transport layer communications satellites built by York Space Systems and Lockheed Martin (NYSE: LMT) and eight tracking layer satellites built by SpaceX and L3Harris (NYSE: LHX).

Tranche 1: Tranche 1 satellites will begin launching later this year, or perhaps in early 2025. Eventually, Tranche 1 will include 126 transport layer satellites, built by York, Lockheed, and Northrop Grumman (NYSE: NOC). Thirty-five tracking layer satellites will be built by Northrop, L3Harris, and RTX (NYSE: RTX). An additional 18 "experimental" tactical demonstration satellites (called T1DES) are also planned.

Tranche 2: Things really kick into high gear with Tranche 2 launches in 2026. In total, this part of the project will add approximately 270 transport layer and tracking layer satellites, according to USSF. Lockheed and Northrop were tapped to build the first 72 transport layer satellites -- 36 each -- for $1.55 billion. Rocket Lab (NASDAQ: RKLB) subsequently won a contract to build 18 transport layer satellites for $515 million. Then Lockheed was awarded 18 more satellites (for $890 million), as was L3Harris (for $919 million), and also privately held Sierra Space (for $740 million).