Results 21 to 30 of about 6,623 (297)

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

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
doaj   +1 more source

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
doaj   +1 more source

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

Comparison of Gravitational and Light Frequency Shifts in Rubidium Atomic Clock

Universe, 2020
The article presents the results of an experimental study of the external magnetic field orientation and magnitude influence on the rubidium atomic clock, simulating the influence of the geomagnetic field on the onboard rubidium atomic clock of ...
Alexey Baranov, Sergey Ermak, Roman Lozov, Vladimir Semenov   +3 more
doaj   +1 more source

Highly charged ion (HCI) clocks: Frontier candidates for testing variation of fine-structure constant

Frontiers in Physics, 2023
Attempts are made to unify gravity with the other three fundamental forces of nature. As suggested by higher dimensional models, this unification may require space and time variation of some of the dimensionless fundamental constants.
Yan-Mei Yu, Yan-Mei Yu, B. K. Sahoo, Bing-Bing Suo   +3 more
doaj   +1 more source

Characteristics analysis of compact cesium atomic clock with magnetic state selection

Frontiers in Physics, 2022
This paper introduces a compact magnetic state-selection cesium atomic clock called LIP Cs-3000 and analyses its characteristics. The test results reveal that the ranges of the line width, peak-to-valley ratio and signal-to-noise ratio of Ramsey pattern ...
Jiang Chen, Jiang Chen, Ji Wang, Ji Wang, Lei Guo, Lei Guo, Jun Yang, Jun Yang, Pei Ma, Pei Ma, Liangyu Huang, Liangyu Huang, Zhidong Liu   +12 more
doaj   +1 more source