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A merchandized optically pumped Cesium atomic clock has been realized in China recently. This clock was studied and designed under the support from Chinese National Key Scientific Instrument and Equipment Development Project. Experiencing the two steps of principal and engineering prototype, the clock starts to produce in small scale and comprehensively application tests by users. The tests show the...
A novel acquisition method of the Long-range navigation (Loran)-C signal based on matched filter is proposed to improve the acquisition performance of Loran-C signal under heavy noise environment. Higher signal to noise ratio (SNR) could be obtained through matched filtering the received signals. Then outputs are correlated with standard pulse signal and the correlation peaks are judged. Theoretical...
By the National key scientific instrument and equipment development project from Chinese government, a commercial optically pumped Cesium atomic clock was launched in 2012, which is to manufacture a kind of Cesium clock for Telecom and other engineering application areas in China. A prototype of optically pumped Cesium atomic clock has been manufactured in Spaceon China. This clock includes three...
The key of delivering time through telephone channel is measuring time delay. There are two methods of typical time delay measurement in telephone time service: detecting character, detecting carrier phase. Detecting character is easy to implement, but its accuracy is low. While detecting carrier phase can achieve a higher degree of accuracy than measuring character, but the carrier signal is easy...
Compared to other types of atomic clocks, spectral lamp-pumped Rb atomic clock offers the best combination of frequency stability, volume, weight, power consumption, price and robustness for many commercial and military applications. This advantage allowed accelerating greatly the development of state-of-the-art spectral lamp-pumped Rb atomic clock. The Rb atomic clock is widely used in satellite...
Coefficient is one of the main factors which results in Rb clock to be as second frequency standard. Coefficient is from frequency shift mechanisms because of RF power, intensity of lamp light and collision between atoms in absorption cell. However, Rb clock has many advantages in Power dissipation, dimension and cost in comparison with H-maser and Cs beam. This paper shows a traditional Rubidium...
This paper shows a traditional Rubidium atomic clock — XHTF1031. The incorporate lamp and ultra-miniature waveguide cavity introduced in the physics package is the main means to downsize the volume of the clock; the electronics consisting of 6.8GHz direct synthesizer and digital servo system is to enhance the automatic functions which ensure massively fabrication available with low costs. At all,...
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