国家时间频率计量基准包括: 秒长国家计量基准和原子时标国家计量基准

秒长国家计量基准:

红包扫雷miaozhangguojiajiliangjizhunshizhijiefuxianmiaodingyideshiyanzhuangzhi,shuchudebiaozhunpinlvjuyouzuigaojiliangxuetexing,tashijingguojiashencha、pizhunzuoweitongyiquanguomiaozhangliangzhi(pinlvliangzhi)zuigaoyijudejiliangqiju,quanguozhiyouyitao。1967nian,miaodingyicongtianwenmiaogaiweiyuanzimiao,dingyizaiseyuanzijitainengjiyueqianshang。seyuanzizhongchengweizhijiefuxianmiaodingyideshiyanzhuangzhi。

世界上第一台热铯束钟是英国国家物理实验室1955年研制完成的。中国计量科学研究院从70年代起开始了热铯束钟的研究,1981年研制完成的NIM3热铯束钟,相对频率不确定度达到3×10-13,成为中国第一代秒长国家计量基准。2003年,中国计量科学研究院研制完成了中国第一台激光冷却铯原子喷泉钟NIM4,不确定度达到8.5×10-15,随后改进提高至5×10-15,经国家质量监督检验检疫总局批准替代NIM3热铯束钟,成为中国第二代秒长国家计量基准。2014年,中国计量科学研究院研制完成的新一代NIM5铯原子喷泉钟,不确定度达到1.5×10-15,获批取代NIM4成为新的秒长国家计量基准。2014年8月,NIM5铯原子喷泉钟通过国际专家评审开始参加国际原子时合作驾驭国际原子时。2017年改进后的NIM5不确定度达到9×10-16

miaozhangjizhunliyonggaowenjingzhenhuozhediwenlanbaoshijingzhendengpinlvyuan,tongguopinlvbianhuanhecheng9192631770 hzdeweiboxinhao。liyongciweiboxinhaojiliseyuanzichanshengzhongyueqian,wuchaxinhaofankuijipinlvyuanjiangweibopinlvsuodingdaoseyuanzimiaodingyinengjiyueqianshang。youyumiaodingyizaibushourenhewaijiechangganraodegulideseyuanziyueqianpinlv,yincishijiegeguojiliangyuanyanzhidejizhunzhongfuxianmiaodingyidoupingdinghexiuzhengyixiliewulixiaoyingyinrudezhongyueqianpinlvpianyi,baokuowaijiechangyinrudepinlvpianyi,rujiangyuanzizhouweiwenduyinrudeheitifushepinyixiuzhengdao0 kwendu,jiangzhonglichangyinrudepinlvpianyixiuzhengdaopingjunhaipingmianshuizhun。

miaozhangguojiajiliangjizhunzuoweiguojiashijianpinlvjiliangtixideyuantou,fuxianmiaodingyishuchujizhunpinlv,yonglaijiayuqingzhongchanshengbendiyuanzishi,xiangguojijiliangjubaosongshuju,jiayuguojiyuanzishi,yezhijieceliangguangzhongdenggaoxingnengyuanzizhongdepinlv。

suizhekexuejishudefazhan,miaodingyikenengbeixiugai,qishi,anxindingyifuxianmiaozhangdeshiyanzhuangzhijiangchengweixindemiaozhangguojiajiliangjizhun。

原子时标国家计量基准:

zhongguojiliangkexueyanjiuyuanyu1980nianjianlileyuanzishibiao,1983nianjingguojiajiliangzhuguanbumen(yuanguojiazhiliangjiandujianyanjianyizongju)pizhun,youzhongguojiliangkexueyanjiuyuan(nim)guojiashijianpinlvjiliangzhongxinjianlihebaochideyuanzishibiaoutc(nim)weiyuanzishibiaoguojiajiliangjizhun,shitongyiquanguoshijianpinlvliangzhidezuigaoyiju。

yuanzishibiaoguojiajiliangjizhunyoushoushizhongzu、neibuceliangxitong、suyuanbiduixitong、shujuchulixitong、suanfajikongzhixitongdengbufenzucheng。shoushizhongzuyoubujianduanyunxingdeduotaishangpinqingyuanzizhongheshangpinseyuanzizhongzucheng,chanshenglianxuwendingdeshijianpinlvxinhao;neibuceliangxitongtongguoshuanghunpinshichaceliangdedaozhongguojiliangkexueyanjiuyuanxiediaoshijieshiutc(nim)yugeshoushiyuanzizhongzhijiandeshicha(xiangweicha);suyuanbiduixitongtongguoquanqiuweixingdaohangxitong(gnss)jiweixingshuangxiangshijianpinlvchuandi(twstft)jishushiutc(nim)shixianguojibidui,canjiaguojiyuanzishihezuo;shujuchulixitongduineibubiduiheguojibiduishujujinxingcunchu、jiancehechuli;suanfajikongzhixitongduizhongzuxiangguanshujujinxingjisuanchanshengbendiyuanzishi,liyongzhongguojiliangkexueyanjiuyuanbaochidesepenquanzhongmiaozhangguojiajiliangjizhunheguojiyuanzishihezuofanhuideutc-utc(nim)shujuduiqijinxingjiayu(xiaozhun),chanshengzhunquewendingdeutc(nim)。

utc(nim)zuoweiyuanzishibiaoguojiajiliangjizhun,qiliangzhisuyuanzhiguojibiaozhunshijian-xiediaoshijieshi(utc)bingduiutczuogongxian;tongshizuoweiguojiashijianpinlvliangzhideyuantou,baozhengguoneishijianpinlvceliangliangzhidezhunquetongyi。yuxiediaoshijieshi(utc) shixianquanqiuweixingdaohangxitong(gnss)gongshijizaiboxiangweishipinchuandi,baozhengleutc(nim)canjiataihezuodegaoshuipinglianjie,yuutcpianchazai±5 nsnei,biaozhunhechengbuquedingduyouyu2 ns。

红包扫雷zhongguojiliangkexueyanjiuyuanjiyuzaiboxiangweidelianjieyu2013nianchenggongzhudaoleouyasiguoseyuanzipenquanzhongguojibidui,biaozhizhongguodiyicichenggongshixianjizhunzhongguojibidui;shixianshijianchuandilianluxiaozhunjishujizhuangzhi,2014nianbeibipmzhidingweiguoji9jiayileignssshijianchuandilianluxiaozhunshiyanshi,fuzeduiyataiquyuneierleishiyanshidexiaozhun。