NATO Allies Launch HALO Constellation for Space Defense

NATO has announced two major space defense initiatives backed by billions in new funding. Eight allies plan to build the HALO multinational satellite constellation, while 17 nations have committed to strengthening the Alliance Persistent Surveillance from Space (APSS) initiative.

According to an interview with NATO Communications and Information Agency (NCIA) General Manager Dylan Browne published by Via Satellite, the momentum follows a summit where allies announced over $50 billion in new procurements. Browne stated that European Allies and Canada increased their core defense investments by more than $139 billion in 2025, a nearly 20 percent rise.

A Hybrid Constellation

The Hybrid Alliance Layered Operations in Space (HALO) constellation aims to improve NATO's resilience and military advantage. Its goal is to network sovereign, nationally owned military satellites into a megaconstellation for high-speed communications, intelligence, and missile tracking. This approach seeks to overcome the cost, time, and coverage limits of single-nation fleets.

An exploratory phase will define the multinational architecture, requirements, scope, and costs. The first phase will focus on building a new transport layer from scratch to connect existing and future national assets. Interoperability with national initiatives like the U.S. Proliferated Warfighter Space Architecture will be essential. A NATO source said it is too early to say when implementation will start.

Increased Commitment and Contracts

Browne highlighted NCIA's role in executing this vision. On behalf of the agency, he signed a contract for the Protected Business Network (PBN) program to deliver a secure, cloud-enabled digital infrastructure. He also signed a contract to advance procurement of a Data-Centric Platform for NATO’s Air Command and Control.

The PBN aims to establish the foundation for classified digital operations across NATO. It is designed to ensure decisionmakers and warfighters can communicate and access data in a modern, scalable cloud environment more resilient to attack. The program will replace legacy approaches with a common cloud operating model and standardized engineering practices.

Space as a Core Domain

NATO declared space its fifth operational domain in 2019. Browne said the demand for NCIA's expertise is increasing, with approximately 25 percent of its budget now devoted to space initiatives. These cover secure communications, commercial satellite communications, imagery and intelligence, and deployed communications and information systems (CIS).

NCIA manages over 300 complex programs and houses the Joint Intelligence, Surveillance and Reconnaissance (JISR) Centre. Browne stated that Military Satellite Communications remains the cornerstone of NATO’s SATCOM architecture, delivering secure communications from strategic nuclear deterrence to tactical forces. NCIA is working to improve terminals, spectrum efficiency, and protected communications.

“NATO recognizes the growing importance of the commercial space sector,” Browne added. “We developed a Commercial Space Strategy aimed at strengthening cooperation with industry, improving access to commercial capabilities, and making sure we can integrate innovations into alliance operations.”

Focused Projects and Partnerships

Specific projects are tailoring space solutions for regional challenges. Browne noted that Canada and Norway have expanded cooperation through the Arctic Space Partnership, focusing on Earth Observation, satellite communications, and maritime awareness. NATO has also developed the NORTHLINK initiative to connect space-based communication systems across the Arctic using existing commercial satellites.

Another pilot, Project SINBAD (Smart Indicators and Warning Broad Area Detection), is testing commercial space-based monitoring services to support NATO users. Browne explained the challenge: “the demands of our military commands for speed of detection and delivery of alerts is significantly higher than for many commercial ‘customers’, and with a global area of interest, the veracity of targets of interest is high.”

He said commercial providers must rise to meet the operational needs set by the Alliance.