Results 41 to 50 of about 23,934,500 (209)
Real‐time and dynamic time transfer method based on double‐differenced real‐time kinematic mode
IET Radar, Sonar & Navigation, 2021 In this study, a real‐time and dynamic time transfer method based on double‐differenced (DD) real‐time kinematic (RTK) mode is proposed. First, the method forms the DD observations of Global Navigation Satellite System (GNSS) to fix the DD ambiguity, and
Rui Tu +7 more
doaj +1 more source
Carrier Phase Common-View Single-Differenced Time Transfer via BDS Penta-Frequency Signals
Remote SensingThe BeiDou Navigation Satellite System (BDS-3) has officially provided services worldwide since July 2020. BDS-3 has added new signals for B1C, B2a and B2b based on old BDS-2 B1I and B3I signals, which brings opportunities for achieving high-precision ...
Wei Xu +6 more
doaj +1 more source
Psychology, 2013 The goal of the article is to definite that sleep with sufficient time and depth is a high quality sleep regardless of whether the sleep time changes or not. The author had conducted an experiment about sleep time. During the experiment, the author changed participants’ main sleep time four times. The result of the survey shows that participants take a
openaire +2 more sources
Time-Frequency Transfer with Quantum Fields [PDF]
Physical Review Letters, 1996 Clock synchronisation relies on time-frequency transfer procedures which involve quantum fields. We use the conformal symmetry of such fields to define as quantum operators the time and frequency exchanged in transfer procedures and to describe their transformation under transformations to inertial or accelerated frames. We show that the classical laws
Jaekel, Marc-Thierry, Reynaud, Serge
openaire +4 more sources
Applied Sciences, 2018 International time transfer based on Global Navigation Satellite System (GLONASS) precise point positioning (PPP) is influenced by inter-frequency code biases (IFCBs) because of the application of frequency division multiple access technique.
Yulong Ge +5 more
semanticscholar +1 more source
Relativistic Time Transfer for Inter-Satellite Links
Frontiers in Astronomy and Space Sciences, 2016 Inter-Satellite links (ISLs) will be an important technique for a global navigation satellite system (GNSS) in the future. Based on the principles of general relativity, the time transfer in an ISL is modeled and the algorithm for onboard computation is ...
Yi eXie, Yi eXie, Yi eXie
doaj +1 more source
Analysis on GNSS Common View and Precise Point Positioning Time Transfer: BDS-3/Galileo/GPS
Remote SensingThe International Bureau of Weights and Measures (BIPM) currently mainly uses GPS time transfer for the calculation of UTC. In order to enhance the reliability of the time links, the common-view (CV) and Precise Point Positioning (PPP) time transfer ...
Meng Wang +6 more
doaj +1 more source
Time prediction model of subway transfer [PDF]
SpringerPlus, 2016 Walking time prediction aims to deduce waiting time and travel time for passengers and provide a quantitative basis for the subway schedule management. This model is founded based on transfer passenger flow and type of pedestrian facilities. Chaoyangmen station in Beijing was taken as the learning set to obtain the relationship between transfer walking
Zhou, Yuyang +3 more
openaire +2 more sources
PPP time transfer using an adaptive clock constraint model
Geo-spatial Information ScienceIn the processing of Precise Point Positioning (PPP) data, the receiver clock is approached with nearly infinite uncertainty, rendering it difficult to fulfill the requirements of high-precision time frequency applications.
Jinyang Han +4 more
doaj +1 more source
High-Precision Time Transfer Over 2000-km Fiber Link
IEEE Photonics Journal, 2015 Manuscript received September 28, 2015; revised October 26, 2015; accepted November 5, 2015. Date of publication November 10, 2015; date of current version November 20, 2015.
Hao Zhang +4 more
doaj +1 more source