Results 31 to 40 of about 124,588 (288)
Photonics, 2023 The use of statistical estimation theory to boost the metrological performance of the measurement apparatus is becoming increasingly popular in a wide range of applications.
Fabrizio Sgobba +6 more
doaj +1 more source
Synchronization Performance Assessment of GNSS-Based Time Source in 5G Communication Architecture
IEEE AccessPrecise timing using Global Navigation Satellite System (GNSS) has been widely applied in various civil technologies, such as bank transactions, internet communication, and power grid management.
Tzu-Pang Tseng +2 more
doaj +1 more source
Improving the GRACE Kinematic Precise Orbit Determination Through Modified Clock Estimating
Sensors, 2019 Utilizing global positioning system (GPS) to determine the precise kinematic orbits for the twin satellites of the Gravity Recovery and Climate Experiment (GRACE) plays a very important role in the earth’s gravitational and other scientific fields.
Xingyu Zhou +4 more
doaj +1 more source
, 2010 A low maintenance long-term operational cryogenic sapphire oscillator has been implemented at 11.2 GHz using an ultra-low-vibration cryostat and pulse-tube cryocooler.
Hartnett, John G., Nand, Nitin R.
core +1 more source
Cancellation of light-shifts in an N-resonance clock
, 2005 We demonstrate that first-order light-shifts can be cancelled for an all-optical, three-photon-absorption resonance ("N-resonance") on the D1 transition of Rb87. This light-shift cancellation enables improved frequency stability for an N-resonance clock.
Aleksei V. Taichenachev +11 more
core +1 more source
Extragalactic radio source stability and VLBI celestial reference frame: insights from the Allan standard deviation [PDF]
Astronomy & Astrophysics, 2018 Aims. We investigate the composition of the noise in coordinate time series of several hundreds of extragalactic radio sources monitored by the geodetic VLBI program since 1979. The noise type is identified at all available timescales longer than one year, following the observational history of the source. Methods.
Gattano, C., Lambert, S., Le Bail, K.
openaire +3 more sources
IEEE Photonics Journal, 2018 An electrical-domain self-adaptive mid-infrared absorption spectroscopy for methane detection based on an interband cascade laser was demonstrated. By adding noise into the laser drive signal, denoising and sensing performances were evaluated for the ...
Fang Song +6 more
doaj +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objectives Retrograde trans‐synaptic degeneration (rTSD) from posterior visual pathway lesions in multiple sclerosis (MS) is characterized by hemi‐macular ganglion cell‐inner plexiform layer (GCIPL) thinning and contralateral visual field loss.
Abdul Jaber Tayem +17 more
wiley +1 more source
Effect of shield magnetization on variations in the frequency of onboard rubidium atomic clocks
St. Petersburg Polytechnical University Journal: Physics and MathematicsIn the paper, the results of a study of the influence of the magnetic shield magnetization on the relative frequency instability of small-sized rubidium atomic clocks have been presented.
Ermak Sergey +4 more
doaj +1 more source
Locating Two-Level Systems in a Superconducting Xmon Qubit
Applied Sciences, 2023 One significant source of decoherence in superconducting circuits is known as two-level systems (TLSs), found in amorphous oxide layers. These circuits can, however, also be utilized as spectral and temporal TLS probes.
Xin-Xin Yang +7 more
doaj +1 more source