For faster navigation, this Iframe is preloading the Wikiwand page for 授时.

授时

维基百科,自由的百科全书

此条目没有列出任何参考或来源。 (2009年12月6日)维基百科所有的内容都应该可供查证。请协助补充可靠来源改善这篇条目无法查证的内容可能会因为异议提出而移除。
根据中国国家标准GB/T 4961-1999《广播报时信号》制作的中国大陆广播电台常用的报时信号,于每小时的59分55秒开始播放。每一响间隔1s(±0.001s),前5响频率800Hz(±0.8Hz),每一响持续0.25s(±0.001s);最后一响于整点时发出,频率1600Hz(±1.6Hz),持续0.5s(±0.001s)。

授时的基本含义就是通过标准或者定制的接口和协议,为其他设备或系统提供时间信息。其基本渠道是短波、电视信号、电缆网络等等。授时精度从纳秒级(ns)到毫秒级(ms)不等,主要由原子钟卫星系统、网络、高稳定度振荡器等作为时间源。

现在,中国大陆的官方标准授时由位于陕西的国家授时中心负责。

随着系统的大型化、复杂化,对时间同步和时间精度的要求越来越高,授时的应用领域也得到很大的扩展:

  1. 电信
  2. 电力
  3. 金融
  4. 计算机系统
  5. 网络
  6. 分布式数据采集
  7. 国防
  8. 电子政务
{{bottomLinkPreText}} {{bottomLinkText}}
授时
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.