精度|震撼！看，北斗卫星的“心脏”这样跳动→_北斗|原子钟|数字|卫星|世界

【精度|震撼！看，北斗卫星的“心脏”这样跳动→】 <br />文章图片 <br /> <br /> <br /><img alt="精度|震撼！看，北斗卫星的“心脏”这样跳动→" onload="javascript:ImgReSize(this)" src="https://p7.itc.cn/q_70/images03/20210627/39f7c38eb8ad4fa8a7fb527c0ea6e801.png" /> <br />文章图片 <br /> <br /> 铷原子钟是北斗导航卫星最核心的产品，它直接决定着导航卫星定位和授时的<br /> 准确性，是整个导航卫星的“心脏” 。<br /> <br /><img alt="精度|震撼！看，北斗卫星的“心脏”这样跳动→" onload="javascript:ImgReSize(this)" src="https://p6.itc.cn/q_70/images03/20210627/dff6f2eae4d44b74b5a564b64574f589.png" /> <br />文章图片 <br /> <br /> <blockquote>航天科技集团五院西安分院北斗三号卫星副总设计师张立新：得益于中国人自主打造的新一代高精度铷钟，北斗三号导航卫星的授时精度优于10纳秒，也就是说利用它，我们可以用一秒钟的一亿分之一这个精度来校准时间，定位精度也由此前的10米级提高到米级。<br /> </blockquote> <br /><img alt="精度|震撼！看，北斗卫星的“心脏”这样跳动→" onload="javascript:ImgReSize(this)" src="https://p1.itc.cn/q_70/images03/20210627/26a86a5c2f2349a496e8ec9a0a4caeda.png" /> <br />文章图片 <br /> <br /> 自然界中，铷原子发生能级跃迁时，会产生每秒钟超过68亿次的电磁波震动，始终不变。铷原子钟就是利用这种自然现象制作出来的精密计时工具。<br /> <br /><img alt="精度|震撼！看，北斗卫星的“心脏”这样跳动→" onload="javascript:ImgReSize(this)" src="https://p4.itc.cn/q_70/images03/20210627/398989fe1ab441059af8f1b89cb1413a.png" /> <br />文章图片 <br /> <br /> 工程师们要利用真空罐，模拟铷原子钟在轨长期工作的环境，测试包括频率稳定度、漂移率、准确度等多项指标。只有达到了百亿分之三秒的精度，并且24小时漂移率小于百万亿分之一，这个铷钟才能成为北斗卫星的“心脏” 。真空罐里的测试，需要连续进行90天以上才能全面评估铷原子钟的性能。<br /> <br /><img alt="精度|震撼！看，北斗卫星的“心脏”这样跳动→" onload="javascript:ImgReSize(this)" src="https://p3.itc.cn/q_70/images03/20210627/c4b943d69676420bba4f442c900af9d1.png" /> <br />文章图片 <br /> <br /> 2020年6月23日，随着第55颗，也是最后一颗组网用的导航卫星顺利入轨，中国人完成了北斗三号覆盖全球的最后一块拼图。中国因此成了第三个拥有全球卫星导航系统的国家。精准的时间，精确的定位，这个完全自主控制的精密时空基准，是数字时代的国之重器。<br /> <br /><img alt="精度|震撼！看，北斗卫星的“心脏”这样跳动→" onload="javascript:ImgReSize(this)" src="https://p7.itc.cn/q_70/images03/20210627/d2aa08abd6d3480db1649e076c73729f.png" /> <br />文章图片 <br /> <br /> 从自动驾驶到智慧工厂，从大数据中心到智慧城市建设，从万物互联到人工智能，它的影响将深入这个世界最细微的层面，成为中国乃至世界信息数字化时代的超级引擎。<br /> 来源：央视财经 <br /> 责任编辑：吕天颐 <br /> 校对：罗燕 <br /> 支持我们请点赞或使用评论功能↓↓↓ <br /></p> <div class="dede_pages"><ul></ul></div> <div class="pcd_ad"> <div 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