WASHINGTON — A satellite designed by Northrop Grumman to track hypersonic and ballistic missiles has passed a key review, allowing the company to continue to develop the $153 million spacecraft scheduled for delivery in 2023.  

The U.S. Missile Defense Agency in January selected Northrop Grumman and L3Harris to develop sensor satellites known as Hypersonic and Ballistic Tracking Space Sensor (HBTSS).

Northrop Grumman announced Nov. 10 that its satellite passed a critical design review, which means MDA upheld the company’s technical approach for detecting and tracking ballistic and hypersonic missiles from low Earth orbit.

The HBTSS satellites are part of DoD’s planned multi-layered network of spacecraft that can sense heat signatures to detect and track missiles from launch through their entire flight trajectory.

After the HBTSS prototype is delivered, Northrop Grumman said it will conduct an on-orbit test to demonstrate its ability to track hypersonic threats, process sensor data and hand off the information to command centers so the missile can be intercepted.

A long-term vision for HBTSS is a constellation of satellites connected by optical cross links than can provide global coverage, and detect and track multiple targets.

Sandra Erwin writes about military space programs, policy, technology and the industry that supports this sector. She has covered the military, the Pentagon, Congress and the defense industry for nearly two decades as editor of NDIA’s National Defense...