USA 171, also known as OBJECT_ID 2003-041A, is a satellite operated by NROC (National Reconnaissance Office) of the US. It was launched on September 9, 2003, from Space Launch Complex 40 at Cape Canaveral Air Force Station using the Titan 401B/Centaur launch vehicle. The satellite features a configuration with a large dish antenna and a smaller TELINT dish antenna, along with 3-Axis-Stabilization for precise positioning. It has dimensions of approximately 6 meters in length, 4 meters in diameter, and a span of 30 meters, indicating the presence of deployable elements such as solar arrays or antennas. The satellite's dry mass is recorded at 5000 kilograms, which matches its launch mass. Its primary mission involves SIGINT (Signals Intelligence), ELINT (Electronic Intelligence), and COMINT (Communications Intelligence) operations. Power supply comes from solar arrays and batteries.