Results 21 to 30 of about 2,371 (202)

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

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

An Attitude Navigation System Based on the GPS [PDF]

open access: yesEngineering and Technology Journal, 2010
In this paper, the use of multi-GPS receiver to estimate the parameters ofattitude (orientation) of a platform is developed. The GPS receiver has twomeasurements; pseudorange and carrier phase.
Saad A-R. Makki, Mushtaq Talib Abd
doaj   +1 more source

An Efficient BDS-3 Long-Range Undifferenced Network RTK Positioning Algorithm

open access: yesRemote Sensing, 2023
In 2020, the BeiDou-3 global navigation satellite system (BDS-3) was officially completed and put into service. Currently, network real-time kinematic (RTK) technology is considered the main means through which to improve the positioning accuracy of the ...
Huizhong Zhu   +3 more
doaj   +1 more source

A Simulation Study on Triple Frequency Ambiguity Resolution for Reference Stations Using Different Strategy Regarding Elevation angles [PDF]

open access: yesE3S Web of Conferences, 2019
This paper proposes an ambiguity resolution method using triple frequency for reference stations. Using the reference coordinate information, geometry based ambiguity resolution performance is analysed. Although orbit errors and tropospheric model errors
Yu Sun-Kyoung   +3 more
doaj   +1 more source

A Multi-Frequency Galileo PPP-RTK Convergence Analysis with an Emphasis on the Role of Frequency Spacing

open access: yesRemote Sensing, 2021
The single-receiver integer ambiguity resolution-enabled variant of precise point positioning (PPP), namely PPP-RTK, has proven to be crucial in reducing the long convergence time of PPP solutions through the recovery of the integerness of the user ...
Dimitrios Psychas   +2 more
doaj   +1 more source

Performance investigation of LAMBDA and bootstrapping methods for PPP narrow-lane ambiguity resolution

open access: yesGeo-spatial Information Science, 2021
Precise point positioning with ambiguity resolution (PPP-AR) is a powerful tool for geodetic and time-constrained applications that require high precision.
Omer Faruk Atiz   +4 more
doaj   +1 more source

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

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