The directive also requires that the DoD develop measures to prevent the hostile use of GPS and its augmentations to ensure that the U.S. retains a military advantage without unduly disrupting or degrading civilian uses. The DoD has an active Navigation Warfare (Navwar) Program fulfilling these requirements. The decision to discontinue SA was supported by the commitment being made by the US in the development and deployment of capabilities to selectively deny civil radionavigation signals on a regional basis when our national security is threatened. This regional approach to preventing adversaries from using radionavigation services against us circumvents the need to degrade the civil GPS system globally through the SA technique.
https://web.archive.org/web/20050921115614/
http://ngs.woc.noaa.gov/FGCS/info/sans_SA/docs/GPS_SA_Event_QAs.pdf【 在 Questioner (Questioner) 的大作中提到: 】
: 谢谢。
: 问下这个白皮书是哪里的?
: 可以下载到么?
: ...................
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