Space-Based Infrared System

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The Space-Based Infrared System (SBIRS) is a United States Space Force system intended to meet the United States' Department of Defense infrared space surveillance needs through the first two to three decades of the 21st century. The SBIRS program is designed to provide key capabilities in the areas of missile warning, missile defense, battlespace characterization and technical intelligence via satellites in geosynchronous Earth orbit (GEO), sensors hosted on satellites in highly elliptical orbit (HEO), and ground-based data processing and control. A total of twelve satellites carrying SBIRS or STSS payloads had been launched: SBIRS GEO-1 (USA-230, 2011), SBIRS GEO-2 (USA-241, 2013), SBIRS GEO-3 (USA-273, 2017), SBIRS GEO-4 (USA-282, 2018), SBIRS GEO-5 (USA-315, 2021), SBIRS GEO-6 (USA-336, 2022), SBIRS HEO-1 (USA-184, 2006), SBIRS HEO-2 (USA-200, 2008), SBIRS HEO-3 (USA-259, 2014), STSS-ATRR (USA-205, 2009), STSS Demo 1 (USA-208, 2009) and STSS Demo 2 (USA-209, 2009). The manufacturing contract for SBIRS GEO-5 and SBIRS GEO-6 was awarded in 2014. Funding for SBIRS GEO-7 and SBIRS GEO-8 was canceled in 2019.