to explore combining commercial RF capabilities into NRO's geospatial intelligence architecture. Also in 2019, the U.S. Federal Communications Commission (FCC) approved a license allowing HawkEye 360 to eventually launch up to 80 incremental satellites for the eventual steady-state operation of a 15-cluster constellation. In 2020, the National Air and Space Museum added a full-size model of one of HawkEye 360's Pathfinder satellites to display in their museum as part of an upcoming exhibit detailing the story of the space age. In July, HawkEye 360 reported their second cluster of satellites has successfully completed their environmental testing: one of the last technical milestones before the second cluster for launch, which was launched on Spaceflight ride-share mission on 24 January 2021 aboard a SpaceX Falcon 9. HawkEye 360 has plans to execute and maintain a 30-satellite constellation, and the company is scheduled to launch new clusters once a quarter starting in early 2021. Technology Currently, HawkEye 360 has three small satellites in the Pathfinder cluster orbiting the earth at an altitude of 575 km. In order to precisely triangulate and map signals, the satellites fly in a special formation facilitated by a novel water propulsion system. Each satellite (also referred to as a Hawk) in the cluster has a Software-Defined Radio (SDR) with the ability to detect a wide range of radio frequencies, and once all three satellites have picked up on a common signal, they can trilaterate that signal with accuracies dependent upon the terrain, signal, and other factors. HawkEye 360's second satellite cluster includes several improvements: the new satellites have the ability to collect multiple RF signals at one time to create layers of RF information. Each of the satellites also has an improved SDR, so they can collect higher quality data for more accurate geolocation. In addition to this, the satellites have more powerful processing to handle more data. As of January 2023, 6 clusters have been launched (including the Pathfinder one), for a total of 18 satellites currently in orbit: Maritime usage In order to maintain maritime visibility, most vessels are mandated to use Automatic Identification System (AIS) beacons aboard vessels to locate them. Although AIS is a useful tool, there are many ways it can be rendered ineffective. Ships can turn their beacons off, effectively making them very difficult to detect and track. Other times, ships will input invalid coordinates (referred to as spoofing), so as to