摘要：It is increasingly clear that U.S. economic vitality and development, as well as global competitiveness, have strong and enduring ties to the space segment. Remote sensing, communications, surveillance, and a host of other areas of U.S. leadership are underpinned by space technology. Moreover, our national pursuit of robotic and human space exploration remains a cornerstone of U.S. aspirations. As was made clear in the U.S. National Space Policy (NSP) issued by President Barack Obama on 28 June 2010, a central overlay of the U.S. space program is that we must understand, be able to forecast, and, if possible, mitigate the effects of the space environment on technological systems.
