In the navigation war, the prevention of timing service to adversaries in local area can be realized by turning off all the navigation signals of visible satellites artificially. Ibis study takes turning off the navigation signal for preventing the timing service in local area as an example, describing the simulation process of prevention of timing service by turning off the navigation signal in local area, and puts forward the evaluation method of positioning and timing performance as well. The effect of preventing timing service on the performance of global positioning and timing service is analyzed subsequently. The results imply that, with the prevention of timing service in local area by partially turning off the navigation signal, both positioning and timing service are limited to the civilian users around the site, and the accuracy of positioning will become worse in the global area. Moreover, the availabilities of positioning and tuning will be decreased in global area under the circumstance of partially turning off the navigation signal for preventing die timing service in local area.%在导航战中,在区域范围内阻止对手使用授时服务可通过关闭战区目标点的所有可见卫星信号来实现.以关闭部分导航信号阻止区域授时服务为例,描述了阻止区域授时服务的导航信号关闭仿真流程,提出了定位授时性能评估方法,并就关f闭部分导航信号阻止区域授时服务对全球定位服务和授时服务产生的影响进行了分析讨论.仿真结果表明,关闭部分导航信号阻止区域授时服务会造成目标点周边地区的用户无法使用定位服务和授时服务,引起全球范围内定位精度的恶化,同时还会降低全球用户的定位可用性和授时可用性.
展开▼
