Results 31 to 40 of about 3,052 (255)

The Future of Single-Frequency Integer Ambiguity Resolution

open access: yes, 2011
The coming decade will bring a proliferation of Global Navigation Satellite Systems (GNSSs) that are likely to enable a much wider range of demanding applications compared to the current GPS-only situation. One such important area of application is single-frequency real-time kinematic (RTK) positioning.
Verhagen, S, Teunissen, Peter, Odijk, D
openaire   +4 more sources

Three carrier ambiguity resolution : distance-independent performance demonstrated using semi-generated triple frequency GPS signals [PDF]

open access: yes, 2010
In spite of significant research in the development of efficient algorithms for three carrier ambiguity resolution, full performance potential of the additional frequency signals cannot be demonstrated effectively without actual triple frequency data. In
Li, Bofeng   +4 more
core   +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

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

Influence of the inhomogeneous troposphere on GNSS positioning and integer ambiguity resolution

open access: yesAdvances in Space Research, 2021
The tropospheric delay is one of many error sources that affect the Global Navigation Satellite System (GNSS) positioning solutions. The widely used troposphere models assume a homogeneous atmosphere so that only the zenith delay needs to be determined and is mapped through an elevation-dependent mapping function.
Hongyang Ma   +5 more
openaire   +3 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

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

open access: yesAdvanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

Reliability control of GNSS carrier-phase integer ambiguity resolution [PDF]

open access: yes, 2015
This research investigates how to obtain accurate and reliable positioning results with global navigation satellite systems (GNSS). The work provides a theoretical framework for reliability control in GNSS carrier phase ambiguity resolution, which is the
Wang, Lei
core  

A baseline constrained LAMBDA method for an integer ambiguity resolution of GNSS attitude determination systems [PDF]

open access: yes, 2008
In this paper, an efficient integer ambiguity resolution method for GNSS attitude determination system is described. The proposed method solves the integer least-squares with quadratic equality constraints(ILSQE) problem and shows an expansion of the ...
Park, C., Teunissen, Peter
core   +1 more source

Giant Electrostriction in Halide Perovskites Revisited With Double‐Modulation Interferometry

open access: yesAdvanced Functional Materials, EarlyView.
A giant electrostrictive effect in lead halide perovskites had been reported previously. This work uses sensitive interferometry to measure the electromechanical response of various halide perovskite samples. The results reveal no intrinsic electrostrictive compression. Instead, the materials expand primarily under an applied electric field as a result
Philipp Ramming   +4 more
wiley   +1 more source

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