Northrop Grumman delivers sensor for missile-warning satellite as Pentagon cancels program

WASHINGTON — Northrop Grumman said it has taken delivery of a missile-warning sensor for a U.S. Space Force satellite program that the Pentagon is now proposing to cancel, highlighting the tension between legacy space acquisitions and a shift toward newer architectures.

The company said April 30 it accepted delivery of a sensor designed for the polar component of the Next-Generation Overhead Persistent Infrared program, known as Next-Gen OPIR Polar. The effort, launched in 2018, was intended to field two satellites in highly elliptical orbits to monitor missile threats over the Northern Hemisphere.

Northrop said the delivery “keeps the missile warning program on track.” But days earlier, the Pentagon’s proposed fiscal year 2027 budget disclosed that the Space Force “intends to terminate” the polar program and includes no funding for the program going forward.

The move to cancel Next-Gen OPIR Polar reflects a broader shift inside the Pentagon away from large, bespoke satellites toward more distributed constellations in lower orbits. Budget documents say funding for Polar OPIR is zeroed out beginning in 2027 because the Space Force no longer sees a critical need for the capability, citing investments in missile-warning systems in low and medium Earth orbit.

“Due to projected polar coverage from the Low Earth Orbit (LEO) and Medium Earth Orbit (MEO) layers of the Resilient Missile Warning/Missile Tracking (MW/MT), a risk-informed decision has been made to terminate the Next-Gen OPIR Polar program,” the document states.

The program’s projected cost is $3.4 billion, including $2.1 billion already spent. The budget allocates $436 million in 2026 primarily to close out development activities.

Termination likely to be challenged

Canceling a program of this scale is rarely straightforward. Polar OPIR is tied to a large industrial base, with Northrop Grumman employing thousands of workers across multiple states. That footprint tends to draw scrutiny from lawmakers, particularly when jobs and supply chains are at stake.

Congress has already signaled resistance. Language in the 2026 appropriations bill prohibits the Defense Department from using funds to “pause, cancel, or terminate” both the polar and geosynchronous elements of the Next-Gen OPIR program.

The timing of Northrop’s announcement suggests the fight is likely to play out on Capitol Hill. The company said it remains “on-schedule and on-budget” and emphasized the sensor’s role in detecting faint heat signatures from ballistic and hypersonic threats. A spokesperson said the program “supports a critical mission to build out the missile warning and tracking architecture for the homeland.”

The broader Next-Gen OPIR effort has been a centerpiece of the Space Force’s missile-warning modernization. Initially planned as five satellites, the program has faced delays and cost growth. Eight years in, none have launched. The first satellite — one of the geosynchronous spacecraft built by Lockheed Martin — is now targeted for launch no earlier than 2025.

The GEO portion has been scaled back. The Pentagon in 2024 reduced the planned buy from three satellites to two, with total program costs now estimated at $9.1 billion, according to budget documents.

Defense officials have been signaling this pivot for several years. As early as 2022, leaders argued that traditional missile-warning satellites — large, costly systems that take years to build — were ill-suited to a threat environment shaped by rapid advances in Chinese space capabilities. They pointed to proliferated constellations in low Earth orbit, where dozens of smaller satellites can be deployed faster and at lower cost.

That shift has only accelerated. Over the past year, Department of the Air Force officials have indicated that some legacy programs could be candidates for cancellation as the Pentagon moves toward procurement models that rely more on commercial designs and private-sector investment.

Polar OPIR sits squarely in that transition. The program is caught between a Pentagon effort to reshape its space portfolio and potential pushback from Congress that has historically been reluctant to abandon major defense programs once they are underway.