关键词：传感器；弹道导弹防御系统；防御系统；探测器
摘 要：Why GAO Did This Study. Since 2002, MDA has spent approximately $98 billion and has requested $38 billion more through fiscal year 2018 to develop, test, and field a system to defend against enemy ballistic missiles. The BMDS is comprised of a command and control system, sensors that identify incoming threats, and intercepting missiles. GAO is mandated by law to assess the extent to which MDA has achieved its acquisition goals and objectives, as reported to Congress through its acquisition baselines, and to report on other issues as appropriate. This report examines the agency s progress and any challenges in fiscal year 2013 associated with (1) developing, flight testing, and producing individual systems, which MDA refers to as BMDS elements; and (2) reporting resource and schedule baselines that support oversight. To support this effort, GAO examined MDA s acquisition and test reports, analyzed two of MDA s acquisition baselines resource and schedule to discern progress, and interviewed a wide range of DOD and contractor officials. What GAO Recommends. GAO recommends (1) any changes to the SM-3 Block IB be flight tested before DOD approves full production; (2) retest the fielded GMD interceptor to demonstrate performance; and (3) improve the content of its schedule baselines. DOD partially concurred with the first, non-concurred with the second, and concurred with the third, stating that the production and testing decisions will be made using the proper DOD processes. GAO believes both recommendations are valid as discussed in this report.