Results 21 to 30 of about 1,902,131 (309)

Comparison of Multi-GNSS Time and Frequency Transfer Performance Using Overlap-Frequency Observations

open access: yesRemote Sensing, 2021
The modernized GPS, Galileo, and BeiDou global navigation satellite system (BDS3) offers new potential for time transfer using overlap-frequency (L1/E1/B1, L5/E5a/B2a) observations.
Pengfei Zhang   +5 more
doaj   +1 more source

Time-optimal transfer of coherence [PDF]

open access: yesPhysical Review A, 2012
Published version (with typos in eqs. (25)-(27) corrected)
CARLINI, ALBERTO, Koike T.
openaire   +3 more sources

Numerical analysis of coupled effects of pulsatile blood flow and thermal relaxation time during thermal therapy [PDF]

open access: yes, 2012
The main purpose of this study is to investigate the coupled effects of the pulsatile blood flow in thermally significant blood vessels and the thermal relaxation time in living tissues on temperature distributions during thermal treatments.
Shih, Tzu-Ching; Horng, Tzyy-Leng   +1 more
core   +1 more source

Multipurpose Laser Instrument for Interplanetary Ranging, Time Transfer, and Wideband Communications

open access: yesPhotonics, 2023
In this paper, we discuss the design and feasibility of a multifunctional laser instrument capable of precision ranging, time transfer, and wideband communications over interplanetary distances throughout our solar system.
John J. Degnan
doaj   +1 more source

Improved Multi-GNSS PPP Software for Upgrading the DEMETRA Project Time Monitoring Service

open access: yesSensors, 2019
The H2020 DEMETRA project provides short latency clock monitoring services to the time users using the Atomium precise point positioning (PPP) software developed by the Royal Observatory of Belgium.
Wei Huang   +3 more
doaj   +1 more source

A Case Study Analysis for Designing a Lunar Navigation Satellite System with Time Transfer from the Earth GPS

open access: yesNavigation, 2023
There is growing interest in designing a future lunar navigation satellite system (LNSS) while utilizing a SmallSat platform. However, many design decisions, e.g., regarding the satellite clock and lunar orbit, are yet to be finalized. In our prior work,
Sriramya Bhamidipati   +2 more
doaj   +1 more source

Modelling and Assessment of Single-Frequency PPP Time Transfer with BDS-3 B1I and B1C Observations

open access: yesRemote Sensing, 2022
BDS-3 is now providing global positioning, navigation and timing (PNT) services. BDS-3 has new B1C, B2a and B2b signals compared to BDS-2. This work presents two single-frequency (SF) PPP time transfer models using BDS-3, B1C and B1I observations, and ...
Shengli Wang   +5 more
doaj   +1 more source

Measuring information-transfer delays [PDF]

open access: yes, 2013
In complex networks such as gene networks, traffic systems or brain circuits it is important to understand how long it takes for the different parts of the network to effectively influence one another.
Viola Priesemann   +23 more
core   +1 more source

Time-Frequency Transfer through a 70 dB Free Space Channel: Towards Satellite-Ground Time Dissemination [PDF]

open access: yes, 2020
Time and frequency transfer lies at the heart of the field of metrology. Compared to current microwave dissemination such as GPS, optical domain dissemination can provide more than one order of magnitude in terms of higher accuracy, which allows for many
Qi-Ming Lu (9763412)   +17 more
core   +1 more source

Direct observation of mass-dependent collisionless energy transfer via Landau and transit-time damping [PDF]

open access: yes, 2022
0000-0002-0585-4561The energy transfer from wave to particle occurs in collisionless plasma through the interaction between particle and wave, associated with the deformation of ion velocity space from Maxwell-Boltzmann distribution.
TOKUZAWA, Tokihiko   +7 more
core   +2 more sources

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