Results 21 to 30 of about 2,220 (199)

Ambiguity-Fixing in Frequency-Varying Carrier Phase Measurements: Global Navigation Satellite System and Terrestrial Examples

open access: yesNavigation, 2023
Carrier phase signals are considered among the key observations in global navigation satellite systems (GNSSs) and several other high-precision interferometric measurement systems.
A. Khodabandeh, P.J.G. Teunissen
doaj   +1 more source

Constrained MLAMBDA Method for Multi-GNSS Structural Health Monitoring

open access: yesSensors, 2019
Deformation monitoring of engineering structures using the advanced Global Navigation Satellite System (GNSS) has attracted research interest due to its high-precision, constant availability and global coverage. However, GNSS application requires precise
Haiyang Li   +4 more
doaj   +1 more source

Impact of GPS/BDS Satellite Attitude Quaternions on Precise Point Positioning with Ambiguity Resolution

open access: yesRemote Sensing, 2021
Precise point positioning with ambiguity resolution (PPP-AR) based on multiple global navigation satellite system (multi-GNSS) constellations is an important high-precision positioning tool.
Songfeng Yang   +3 more
doaj   +1 more source

High-Accuracy Real-Time Kinematic Positioning with Multiple Rover Receivers Sharing Common Clock

open access: yesRemote Sensing, 2021
Since the traditional real-time kinematic positioning method is limited by the reduced satellite visibility from the deprived navigational environments, we, therefore, propose an improved RTK method with multiple rover receivers sharing a common clock ...
Lin Zhao   +4 more
doaj   +1 more source

Assessing the Performance of Multi-GNSS PPP-RTK in the Local Area

open access: yesRemote Sensing, 2020
The benefits of an increased number of global navigation satellite systems (GNSS) in space have been confirmed for the robustness and convergence time of standard precise point positioning (PPP) solutions, as well as improved accuracy when (most of) the ...
Hongyang Ma   +4 more
doaj   +1 more source

GNSS Precise Relative Positioning Using A Priori Relative Position in a GNSS Harsh Environment

open access: yesSensors, 2021
To enable Global Navigation Satellite System (GNSS)-based precise relative positioning, real-time kinematic (RTK) systems have been widely used.
Euiho Kim
doaj   +1 more source

Improved GPS-based Satellite Relative Navigation Using Femtosecond Laser Relative Distance Measurements [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2016
This study developed an approach for improving Carrier-phase Differential Global Positioning System (CDGPS) based realtime satellite relative navigation by applying laser baseline measurement data.
Hyungjik Oh   +4 more
doaj   +1 more source

Speciation, Structural Refinement, and Distribution of Ti Sites in Titanium Silicalite‐1 From 47/49Ti NMR Crystallography at 28.2 Tesla

open access: yesAngewandte Chemie, EarlyView.
Titanium silicalite‐1 (TS‐1), used in industrial selective oxidation processes, depends on specific, yet still unresolved Ti sites, dispersed within the framework of an MFI‐zeolite. Applying high field (28.2 T) 47/49Ti NMR and 17O NMR spectroscopy for an array of TS‐1 catalysts enables the development of an NMR crystallography protocol and the ...
Christoph J. Kaul   +14 more
wiley   +2 more sources

Flight-Test Evaluation of Integer Ambiguity Resolution Enabled PPP

open access: yesJournal of Surveying Engineering, 2021
The technology of integer ambiguity resolution-enabled precise-point-positioning (also referred to as PPP-AR) has been proven capable of providing comparable accuracy, efficiency, and productivity to long-baseline real-time kinematic positioning (RTK) during the last decade.
Hongyang Ma   +4 more
openaire   +4 more sources

Precision-Aided Partial Ambiguity Resolution Scheme for Instantaneous RTK Positioning

open access: yesRemote Sensing, 2021
The use of carrier phase data is the main driver for high-precision Global Navigation Satellite Systems (GNSS) positioning solutions, such as Real-Time Kinematic (RTK). However, carrier phase observations are ambiguous by an unknown number of cycles, and
Juan Manuel Castro-Arvizu   +5 more
doaj   +1 more source

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