In the hush-hush, secretive world of space-based spy satellites, few details are publicly available — and groups like the U.S. Space Force, National Reconnaissance Office, the Central Intelligence Agency, and the National Geospatial-Intelligence Agency like it that way.
There's an armada of classified spacecraft assigned an array of vigilant duties. Some intercept radio waves or detect missile launches. Others yield close-up looks at select areas using sharp-eyed optical systems or scan Earth with powerful radar technology.
