Results 71 to 80 of about 4,787 (279)

Undifferenced precise time transfer with information‐constraints

IET Radar, Sonar & Navigation
Satellite navigation systems enable long‐distance and high‐precision time transfers. The authors proposed an undifferenced precise time transfer method with information constraints in this study.
Mingyue Liu, Rui Tu, Qiushi Chen, Qi Li, Junmei Chen, Pengfei Zhang, Xiaochun Lu   +6 more
doaj   +1 more source

Temperature Dependence Cancellation of the Cs Clock Frequency in the Presence of Ne Buffer Gas

, 2011
The temperature dependence of the Cs clock transition frequency in a vapor cell filled with Ne buffer gas has been measured. The experimental setup is based on the coherent population trapping (CPT) technique and a temporal Ramsey interrogation allowing ...
Boudot, Rodolphe, de Clercq, Emeric, Guérandel, Stéphane, Kozlova, Olga   +3 more
core   +4 more sources

Spectral Tuning of Hyperbolic Shear Polaritons in Monoclinic Gallium Oxide via Isotopic Substitution

Advanced Materials, EarlyView.
Spectral tuning of highly directional hyperbolic shear polaritons is realized via isotopic substitution of 16O to 18O in monoclinic β$\beta$‐phase gallium oxide. A red‐shift of almost 40 cm−1 is experimentally demonstrated with near‐field imaging, corroborated by the permittivity change extracted from far‐field experiments and density functional theory.
Giulia Carini, Mohit Pradhan, Elena Gelžinytė, Andrea Ardenghi, Saurabh Dixit, Maximilian Obst, Aditha S. Senarath, Niclas S. Mueller, Gonzalo Álvarez‐Pérez, Katja Diaz‐Granados, Ryan A. Kowalski, Richarda Niemann, Felix G. Kaps, Jakob Wetzel, Raghunandan Balasubramanyam Iyer, Piero Mazzolini, Mathias Schubert, J. Michael Klopf, Johannes T. Margraf, Oliver Bierwagen, Martin Wolf, Karsten Reuter, Lukas M. Eng, Susanne C. Kehr, Joshua D. Caldwell, Christian Carbogno, Thomas G. Folland, Markus R. Wagner, Alexander Paarmann   +28 more
wiley   +1 more source

SISRE of BDS-3 MEO: Evolution as Well as Comparison between D1 and B-CNAV (B-CNAV1, B-CNAV2) Navigation Messages

Remote Sensing
The signal-in-space range error (SISRE) has a direct impact on the performance of global navigation satellite systems (GNSSs). It is an important indicator of navigation satellite space server performance.
Zhenghua Dong, Songlin Zhang
doaj   +1 more source

Hydrogen-maser time and frequency standard at Agassiz Observatory [PDF]

Installation of hydrogen maser for very long baseline ...
Levine, M. W., Vessot, R. F. C.
core   +1 more source

State of the art in the determination of the fine structure constant: test of Quantum Electrodynamics and determination of h/mu

, 2013
The fine structure constant $\alpha$ has a particular status in physics. Its precise determination is required to test the quantum electrodynamics (QED) theory.
Biraben, François, Bouchendira, Rym, Cladé, Pierre, Guellati-Khélifa, Saïda, Nez, François   +4 more
core   +3 more sources

Peptide‐Induced Ferroelectricity in Charge‐Transfer Supramolecular Materials

Advanced Materials, EarlyView.
Bio‐inspired supramolecular charge‐transfer amphiphiles self‐assemble into nanoribbons in water, where peptide chirality‐induced symmetry breaking generates robust ferroelectricity across multiple systems. These water‐processable organic ferroelectrics also enhance neuronal outgrowth and electrophysiological maturity, offering a versatile strategy for ...
James V. Passarelli, Yang Yang, Cara S. Smith, Jing Hao, Dhwanit R. Dave, Ashwin Narayanan, Zaida Álvarez, Broderick K. Johnson, Kelly A. Marshall, Ivan Fithian, Hiroaki Sai, Ruomeng Qiu, Charlotte L. Stern, Liam C. Palmer, Evangelos Kiskinis, Samuel I. Stupp   +15 more
wiley   +1 more source

The effect of the magnetic field on the shielding efficiency in a rubidium atomic clock

St. Petersburg Polytechnical University Journal: Physics and Mathematics
The paper presents the experimental study results of the dependence of the longitudinal shielding coefficient of a magnetic shield (in the direction of the shield axis) on the strengths and mutual orientation of the operational internal and additional ...
Ermak Sergey, Semenov Vladimir, Sergeeva Maria   +2 more
doaj   +1 more source

Microwave-dressed state-selective potentials for atom interferometry

New Journal of Physics, 2015
We propose a novel and robust technique to realize a beam splitter for trapped Bose–Einstein condensates (BECs). The scheme relies on the possibility of producing different potentials simultaneously for two internal atomic states.
V Guarrera, R Szmuk, J Reichel, P Rosenbusch   +3 more
doaj   +1 more source

TDRSS/user satellite timing study [PDF]

A timing analysis for data readout through the Tracking and Data Relay Satellite System (TDRSS) was presented. Various time tagging approaches were considered and the resulting accuracies delineated.
Douglas, F., Kaul, R., Mcgregor, D.
core   +1 more source