Boeing has completed a series of tests of its Ultra Low-Cost Seeker (ULCS), a new radar sensor designed to provide lower-cost precision guidance for a range of offensive and defensive weapons.
The company is evaluating ULCS for applications across its integrated air and missile defense, direct-attack, and cruise missile portfolios. The development comes as the U.S. defense industry seeks to increase weapons production while reducing the cost of individual systems.
The seeker uses commercial off-the-shelf components that have been adapted for military applications. Boeing has designed the system around a modular open architecture intended to support production at higher volumes and allow the same sensor technology to be integrated into multiple weapon programs.
ULCS completes initial testing
Boeing conducted the latest ULCS tests in several configurations to examine the sensor’s performance under different operating conditions.
Earlier this summer, the seeker was tested inside an anechoic chamber, during captive-carry flights and on a scaled-down rocket. According to Boeing, the system withstood acceleration and vibration while maintaining its ability to detect and track targets.
A Beechcraft 1900 aircraft carried the seeker over both land and maritime environments to assess baseline detection and tracking performance. At Spaceport America in New Mexico, the sensor tracked an unmanned aerial vehicle from the ground before being installed on a surrogate rocket, where it tracked a reflector drone.
The company is now reviewing data from the test campaign as it continues development of the system. Boeing plans multiple flight tests in 2027 using configurations intended to more closely replicate the seeker’s eventual operational applications.
Multiple weapon programs
A key element of ULCS is its intended use as a common sensor architecture across different weapons. Boeing says the seeker draws on technologies and expertise developed through programs such as the PAC-3 MSE, while targeting lower-complexity threats and a wider range of applications.
“We are developing ULCS with the goal of sharing a common sensor architecture across several of our programs,” said Bob Ciesla, vice president of Boeing Precision Engagement Systems. He added that the system is designed to be modular and compatible with the Weapons Open Systems Architecture, allowing integration and future modifications.
Boeing has not disclosed a specific unit cost for ULCS. Instead, the company says the use of commercial components and the common architecture could significantly reduce the cost of equipping precision weapons with radar guidance.
The development is particularly relevant to missile production because radar seekers can represent a significant manufacturing constraint. Boeing already produces the seeker for the PAC-3 interceptor used by the Patriot air defense system, while the Pentagon has established plans to increase PAC-3 seeker production.
ULCS is being developed as a separate, lower-cost option intended to expand the availability of radar-guided precision weapons across several categories.
“We still have more work to do but the rapid testing our teams have completed prove that this capability is real,” said Steve Wright, Boeing’s senior manager for weapon sensors and advanced guidance.