time and frequency standard

As development of science and technology, the demand for high-precision time and frequency standard is increasing.

随着科技的进步，人们对高精度标准时间频率的需求越来越高。

A Time and Frequency Primary Standard of New Generation: NIM4# Laser Cooling-Cesium Atomic Fountain Clock

新一代时间频率基准：NIM4激光冷却-铯原子喷泉钟

Now we are evaluating the uncertainties with the target to establish the new generation time and frequency primary standard, with uncertainty in the order of 10-15, of this nation.

目前我们正在进行不确定度评估，可望不确定度进入10-15量级，建立我国新一代时间频率基准装置。

Software for Real Time Monitoring the Time Keeping System at NTSC Standard Time and Frequency Laboratory

NTSC时频基准实验室守时系统自动监测软件

Optical clock is the most promising atomic clock and its uncertainty will reach to 10? 1 8 theoretically, which could be the time and frequency standard of the next generation.

光钟是目前公认的最具有发展潜力的原子钟，理论上预期光钟的频率不确定度可达10-18，有望成为国际新一代时间频率基准。

Dissemination of time and frequency standard of Shanghai Observatory

上海天文台时频标准的传播

NIM 4~# Laser Cooling-Cesium Atomic Fountain Clock: A New Generation of Time and Frequency Primary Standard

NIM4~激光冷却铯原子喷泉钟&新一代国家时间频率基准

Cs atomic fountain clock is the reappearance of "seconds" definition of time and frequency standard device, has the highest accuracy, as a reference clock calibration with other atomic clock, is a time and frequency system based.

Cs原子喷泉钟是目前复现秒定义时间频率基准装置，具有最高的准确度，作为基准钟标校其他原子钟，是一个国家时间频率系统的基础。

A new tool that can test the clock base frequency error of energy measuring devices and provide GPS standard time to calibrate real-time clock was introduced in this paper.

介绍了一种用来测量电能计量装置的时钟基频误差，并提供GPS标准时间以校准其实时时钟的新型工具。

Most of the square dance participants take exercise every week of the frequency. the exercise time and strength is to the standard of the sports population.

绝大部分广场舞参与者每周锻炼的频次、时间和强度达到了体育人口的标准。

Acquisition and Transmission of Standard Time, Frequency in Power System

电力系统中标准时间、频率的采集和传输

Application on the Standard Time and Frequency Carried by CCTV Signals

电视信号中标准时间频率的应用

In order to get rid of the dependence on other countries and establish self-governed time and frequency standard, the research on atomic frequency standard is imperative under the situation.

为了改变我国时间频率系统对国外的依赖，建立我国独立的时间频率基准，原子频率标准的研制势在必行。

NIM4# Cold Cesium Atomic Fountain Clock a Time and Frequency Primary Standard of New Generation

NIM4铯冷原子喷泉钟新一代时间频率基准

High precision quartz oscillators were used for the transmission of BPV standard frequency and time signals at Shanghai Observatory.

在上海天文台BPV标频和时间信号的发播工作中，使用了高精度石英晶体振荡器。