Results 11 to 20 of about 2,261,545 (240)

Reliable GPS Integer Ambiguity Resolution. [PDF]

open access: yes, 2011
To operate, guide and control vehicles in low visibility conditions, it is critical that the states of the vehicle are accurately estimated, which includes the three dimensional position, velocity, and attitude. This can be accomplished by GPS (Global Positioning System) aided encoder or GPS aided inertial approaches.
Chen, Anning
core   +12 more sources

Precise Point Positioning Integer Ambiguity Resolution with Decoupled Clocks

open access: yes, 2012
Precise Point Positioning (PPP) integer ambiguity resolution has been a challenging topic during the past five years. So far, three PPP integer ambiguity resolution methods – the singledifference between satellites method, the decoupled clock model and the integer phase clock model – have been developed. By using integer ambiguity resolution in PPP, cm-
Shi, Junbo
openaire   +3 more sources

Population fusion optimization algorithm for GNSS integer ambiguity resolution based on PSO and AFSA [PDF]

open access: yes工程科学学报
Carrier phase measurement plays a crucial role in achieving rapid and high-precision positioning within a global navigation satellite system (Global navigation satellite system, GNSS).
Yingqing GUO   +5 more
doaj   +2 more sources

An Integer Ambiguity Resolution Method Based on the Hybrid Adaptive Differential Evolution Grey Wolf Optimizer Algorithm

open access: yesAlgorithms
In Global Navigation Satellite Systems (GNSS), high-precision position coordinates are typically determined by establishing a double-difference carrier phase observation model and resolving the integer ambiguities within it. Therefore, the ability to fix
Jiangchao Tian   +4 more
doaj   +2 more sources

Sequential Ambiguity Resolution Method for Poorly-Observed GNSS Data

open access: yesRemote Sensing, 2021
Integer ambiguity resolution is required to obtain precise coordinates for the global navigation satellite system (GNSS). Poorly observed data cause unfixed integer ambiguity and reduce the coordinate accuracy.
Haiyang Li   +3 more
doaj   +1 more source

Indoor Carrier Phase Positioning Technology Based on OFDM System

open access: yesSensors, 2021
Carrier phase measurement is a ranging technique that uses the receiver to determine the phase difference between the received signal and the transmitted signal. Carrier phase ranging has a high resolution; thus, it is an important research direction for
Zhenyu Zhang, Shaoli Kang, Xiang Zhang
doaj   +1 more source

Real-Time Precise Orbit Determination for LEO between Kinematic and Reduced-Dynamic with Ambiguity Resolution

open access: yesAerospace, 2022
The real-time integer-ambiguity resolution of the carrier-phase observation is one of the most effective approaches to enhance the accuracy of real-time precise point positioning (PPP), kinematic precise orbit determination (KPOD), and reduced-dynamic ...
Zhiyu Wang   +7 more
doaj   +1 more source

Transformation of propositional calculus statements into integer and mixed integer programs: An approach towards automatic reformulation [PDF]

open access: yes, 1990
A systematic procedure for transforming a set of logical statements or logical conditions imposed on a model into an Integer Linear Progamming (ILP) formulation Mixed Integer Programming (MIP) formulation is presented. An ILP stated as a system of linear
Hadjiconstantinou, E
core   +6 more sources

Accuracy Evaluation of Ionospheric Delay from Multi-Scale Reference Networks and Its Augmentation to PPP during Low Solar Activity

open access: yesISPRS International Journal of Geo-Information, 2021
The Precise Point Positioning (PPP) with fast integer ambiguity resolution (PPP-RTK) is feasible only if the solution is augmented with precise ionospheric parameters.
Lewen Zhao   +2 more
doaj   +1 more source

High-precision indoor fast positioning algorithm based on carrier phase

open access: yesTongxin xuebao, 2022
In order to improve the positioning accuracy and the speed of position solution in indoor wireless environment, a high-precision indoor fast positioning algorithm based on carrier phase was proposed.By introducing the reference terminal, the influence of
Shaoshuai FAN   +3 more
doaj   +2 more sources

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