Quasar-19 (USA-252) (NROL-33)

The third generation of Quasar satellites, also known as SDS-3, represents an advancement in the Satellite Data System (SDS) developed by the United States Air Force. These satellites continue the role of facilitating communication relay for real-time data from US reconnaissance satellites and supporting communication needs for USAF aircraft and ground stations. While specific technical details remain classified, SDS-3 likely incorporates improvements in technology, potentially enhancing data transmission rates, communication reliability, and overall performance.