Results 11 to 20 of about 100,070 (278)

An atomic clock synchronized versatile all-in-one digital ‘LockBox’ [PDF]

Scientific Reports
A reliable and robust active stabilization of different control parameters is key to the success of many experiments. The essential hardware for that; lock-in detection, RF generator, and proportional-integral-derivative feedback control should have ...
S. Johnson, S. Das Gupta, T. R. Saravanan, S. Banerjee, S. Majhi, S. De   +5 more
doaj   +2 more sources

UNDERWATER ACOUSTIC MODEM WITH HIGH PRECISION RANGING CAPABILITY BASED ON SECOND-LEVEL CESIUM ATOMIC CLOCK [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Equipped with a high-precision atomic clock can significantly improve the ranging accuracy of the underwater acoustic ranging system. However, the adverse characteristic of underwater acoustic channel (UAC) seriously deteriorates the ranging accuracy. In
J. Li, J. Li, F. Tong, F. Tong, W. Jiang, W. Jiang, S. Roy   +6 more
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Measurement and Analysis of Atomic Relaxation Time in Active Hydrogen Atomic Clocks

Chinese Journal of Magnetic Resonance, 2022
The atomic relaxation time of a hydrogen atomic clock is the time required for atomic system after the selected state removing the atoms of the ground state hyperfine energy level (F = 0, mF = 0) and (F = 1, mF = −1) state to change from the (F = 1, mF =
LIANG Yue, XIE Yong-hui, CHEN Peng-fei
doaj   +1 more source

Improving the start-up characteristics of the rubidium atomic clock

AIP Advances, 2022
Considering the importance of start-up characteristics of the rubidium atomic clock in engineering applications, the objective of this paper is to optimize the start-up characteristics of the rubidium atomic clock by studying the theory of the rubidium ...
Yonggang Guo, Lili Zhu, Shiwei Wang, Jun Zhang, Fucheng Shi, Jinhai Zhang, Jianxiang Wang, Wenxin Li, Zhidong Liu   +8 more
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Atomic clocks for geodesy [PDF]

Reports on Progress in Physics, 2018
73 pages, 22 ...
Tanja E Mehlstäubler, Gesine Grosche, Christian Lisdat, Piet O Schmidt, Heiner Denker   +4 more
openaire   +3 more sources

Evaluating Optical Clock Performance for GNSS Positioning

Sensors, 2023
Atomic clocks are highly precise timing devices used in numerous Positioning, Navigation, and Timing (PNT) applications on the ground and in outer space.
Enkhtuvshin Boldbaatar, Donald Grant, Suelynn Choy, Safoora Zaminpardaz, Lucas Holden   +4 more
doaj   +1 more source

Nonlinear Autoregressive Model With Exogenous Input Recurrent Neural Network to Predict Satellites’ Clock Bias

IEEE Access, 2021
The prediction of Satellites’ Clock Bias (SCB) plays an important role in optimizing the clock bias parameters in navigation messages, meeting the requirements of real-time dynamic precise point positioning and providing the prior information ...
Yifeng Liang, Jiangning Xu, Fangneng Li, Pengfei Jiang   +3 more
doaj   +1 more source

A modified C-field circuit for the rubidium atomic clock

AIP Advances, 2021
As one of the important circuits of the rubidium atomic clock, the C-field circuit plays a significant role in the rubidium atomic clock’s performance. Generally, a C-field circuit is used to provide a constant current to a C-field coil by forming a weak
Yonggang Guo, Jun Zhang, Shiwei Wang, Kuan Wang, Lixun Wei, Wenxin Li, Fang Lu, Zhidong Liu, Wei Yang   +8 more
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An optically pumped atomic clock based on a continuous slow cesium beam

Frontiers in Physics, 2022
Herein, we report the scheme of an optically pumped atomic clock based on a cold cesium atomic beam source. We propose the laser system and physical mechanism of this atomic clock, wherein the atomic beam travels in an upper parabolic trajectory, thereby
Weibin Xie, Qing Wang, Xuan He, Zhichao Yuan, Shengwei Fang, Nan Chen, Zezheng Xiong, Jun’an Zhang, Xianghui Qi, Shaoguang Li, Xuzong Chen   +10 more
doaj   +1 more source

Analysis of BDS-3 Real-Time Satellite Clock Offset Estimated in Global and Asia-Pacific and the Corresponding PPP Performances

Remote Sensing, 2022
The quality of satellite clock offset affects the performances of positioning, navigation and timing services, and thus it is essential to the Global Navigation Satellite System (GNSS).
Hu Wang, Pengyuan Li, Jiexian Wang, Hongyang Ma, Yangfei Hou, Yingying Ren   +5 more
doaj   +1 more source