U.S. Space Force Adds Second Surveillance Sensor to Japanese Constellation

On August 10, the launch of Japan’s QZS‑7 satellite marked the completion of a bilateral program that places U. S. surveillance sensors on Japanese navigation satellites. The new sensor is the second of its kind to be integrated into the constellation, expanding the United States’ ability to monitor space activity from a platform that is part of Japan’s quasi‑global navigation system. The deployment underscores the growing collaboration between the U. S. Space Force and Japan’s space agency, and it enhances the U. S. capability to track objects and potential threats in the space domain.