Bold claim: Portions of the Pentagon’s low Earth orbit (LEO) satellite constellation are paused while the U.S. military rethinks how to acquire and manage key elements of the system. But here’s where it gets controversial: the shift could redefine who actually builds and operates the PWSA, with implications for competition, industrial base diversity, and national security architecture.
In Washington, the Proliferated Warfighter Space Architecture (PWSA)—the planned mega-constellation of LEO satellites—has parts that are on hold as the Defense Department reviews procurement options and moves some responsibilities outside the Space Development Agency (SDA).
What’s the SDA? Created by the U.S. Space Force in 2019, it was tasked with deploying a large, rapidly procured network of LEO satellites organized in “layers” that support missile warning, tracking, communications, and other military missions. These layers were to be launched in two-year increments, with a cadence intended to accelerate capability delivery.
Current status and key shifts
- The next tranche of satellites for the PWSA’s data transport layer is paused, along with plans for a separate “custody layer” meant to maintain continuous tracking of mobile targets on Earth. The custody layer is intended to persistently track maneuvering objects and keep an ongoing track file over time.
- GP Sandhoo, acting director of the SDA, described the situation as a period of adjustment and realignment for the program. He noted that the procurement process is undergoing significant changes, and the overall plan is being reexamined.
- Historically, SDA’d contracts an entire tranche roughly every other year for different layers; the pause marks a move away from that steady cadence as responsibilities reorganize.
SDA’s tracking layer continues to move forward
- The tracking layer, featuring satellites with infrared sensors to detect and follow missile launches, is still advancing according to Sandhoo. However, the custody layer is likely to be handled by a different Space Force entity rather than SDA.
- The Space Force is expected to stand up a dedicated portfolio acquisition executive focused on space-based sensing and targeting to handle the custody function. This indicates a broader consolidation of responsibility for sensing and targeting within Space Force leadership.
- An industry feedback request is anticipated for Air Moving Target Indicator (AMTI) satellites. AMTI sensors are designed to detect, track, and characterize airborne moving objects across large areas, enabling continuous custody of a target throughout its flight.
Transport layer under review
- Tranche 3 of the transport layer, which serves as the data backbone for the PWSA, is also unsettled. The transport layer is envisioned as a mesh network of satellites with Link 16 data terminals and optical inter-satellite links (laser communications) to move large data volumes between spacecraft.
- Under the original plan, Tranches 1 and 2 would deliver regional capabilities, with Tranche 3 expanding coverage globally. Now, the plan is being reconsidered in light of broader homeland defense priorities and how information is moved to users in a timely manner.
- In parallel, the transport layer is being incorporated into a larger Space Force-led space data transport initiative. The Space Warfighting Analysis Center (SWAC) is conducting studies to determine how future military satellite communications and data relay capabilities should be structured and integrated across classified and unclassified systems.
- One option under consideration would substitute future SDA transport satellites with SpaceX’s Starshield satellites (the military variant of Starlink). This proposal has attracted scrutiny from lawmakers who warn that relying on a single provider could reduce competition and weaken the broader industrial base.
Design, procurement, and timing questions
- Space Force officials stress that a coherent “force design” for the architecture is necessary. They emphasize backward compatibility with existing systems but acknowledge the need for a clearer, future-proof design for the constellation’s architecture.
- The SDA’s role in setting contracting strategies and pacing procurements may evolve as the Space Force assumes more centralized control over parts of the architecture.
Supply chain and checkout challenges linger
- For work already contracted (Tranches 0, 1, and 2), supply chain constraints remain a major hurdle. The most pronounced bottlenecks involve optical communications terminals (laser crosslinks) and encryption equipment.
- Industry-wide challenges in satellite checkout—verifying subsystems and payloads after launch before they enter operational service—continue to slow progress. Sandhoo notes that the industry isn’t yet optimized for the high-throughput, multi-satellite checkout required when dealing with 40–50 satellites, as opposed to the traditional few-satellite checks.
- Lessons from Tranche 0 and the first Tranche 1 launch are guiding future purchases. Tranche 0 consisted of 23 satellites built by four manufacturers, and issues with bus hardware (the basic satellite platforms) proved more problematic than expected. Ground testing and system-level readiness are being strengthened to improve reliability and reduce post-launch surprises.
Bottom line
- The PWSA program is in a period of reorganization, with some components paused and others reallocated to different Space Force offices or partner entities. While this introduces uncertainty in the short term, officials insist the underlying needs—rapid, global, space-based sensing, tracking, and data delivery for the joint force—remain essential and will be pursued through a reimagined architecture.
Question for discussion: Do you think consolidating sensing and data transport under Space Force leadership will strengthen resilience and speed, or will it reduce competition and risk dependence on a single provider? Share your thoughts and any concerns you’d want policymakers to address in the comments.
