SBIRS High

摘要

1.GEO-2 spacecraft launched in March 2013 on board an Atlas Ⅴ. 2.Air Force begins preparation for block buy of SBIRS 5 and 6. 3.GEO-1 spacecraft launched into orbit in May 2011. 4.Third Generation Infrared Surveillance (3GIRS) program was terminated in the FY11 budget.