Results 31 to 40 of about 97,106 (244)

Multi-GNSS precise point positioning for precision agriculture [PDF]

open access: yesPrecision Agriculture, 2018
The main objective of this research was to examine the feasibility of Multi-GNSS precise point positioning (PPP) in precision agriculture (PA) through a series of experiments with different working modes (i.e. stationary and moving) under different observation conditions (e.g. open sky, with buildings or with canopy).
Jing Guo   +8 more
openaire   +3 more sources

Galileo millimeter-level kinematic precise point positioning with ambiguity resolution

open access: yesEarth, Planets and Space, 2019
On February 11, 2019, four additional Galileo satellites were put into service, approaching the completion of the European global navigation satellite system constellation.
Georgia Katsigianni   +3 more
doaj   +1 more source

Evaluation of Ionospheric Delay Effects on Multi-GNSS Positioning Performance

open access: yesRemote Sensing, 2019
Ionospheric delay is a significant error source in multi-GNSS positioning. We present different processing strategies to fully exploit the ionospheric delay effects on multi-frequency and multi-GNSS positioning performance, including standard point ...
Ke Su, Shuanggen Jin, M. M. Hoque
doaj   +1 more source

Optimization method for multi-constellation precise point positioning performance evaluation [PDF]

open access: yesJisuanji gongcheng, 2019
In order to reduce the number of parameters to be estimated and improve the positioning accuracy in the data processing of multi-constellation Precise Point Positioning(PPP),a performance evaluation method based on ambiguity integer solution for the ...
HE Wei,GUO Chengjun,TIAN Zhong
doaj   +1 more source

The Study of Position Accuracy Using Precise Point Positioning (PPP) In Perspective of Indonesian National Standard of Horizontal Reference Network [PDF]

open access: yesE3S Web of Conferences, 2019
Precise point positioning is a GNSS based positioning method that is known to regaining more precise information about major systematical errors in its functional model.
Azis Rasyad A.   +2 more
doaj   +1 more source

The positioning performance of low-cost GNSS receivers in the Precise Point Positioning method [PDF]

open access: yesAdvances in Geodesy and Geoinformation, 2022
Satellite-based positioning, which started being developed in the mid-1960s for military purposes, is now used in almost every area. For the studies single and/or double frequency receivers are used.
Mustafa Fahri Karabulut   +9 more
doaj   +1 more source

The application of Precise Point Positioning in Geosciences [PDF]

open access: yesThe 9th International Conference "Environmental Engineering 2014", 2014
Precise Point Positioning (PPP), an absolute positioning method, is an alternative for conventional relative positioning. Currently the PPP accuracy, is on the level of few-centimetres for static and decimetre for kinematic positioning respectively. However, long convergence time of PPP results is observed.
Jakub Kalita   +2 more
openaire   +1 more source

Research Article. Improved Dual Frequency PPP Model Using GPS and BeiDou Observations

open access: yesJournal of Geodetic Science, 2017
This paper introduces a new dual-frequency precise point positioning (PPP) model, which combines GPS and BeiDou observations. Combining GPS and BeiDou observations in a PPP model offers more visible satellites to the user, which is expected to enhance ...
Afifi A., El-Rabbany A.
doaj   +1 more source

Research on precise positioning of AGV vision based on fuzzy path rectification

open access: yesDianzi Jishu Yingyong, 2018
For the traditional autonomous navigation vehicle(AGV), the problem of high-precision path tracking and precise positioning of key points can not be satisfied.
Li Zhao, Shu Zhibing, Yan Liang
doaj   +1 more source

Instantaneous Sub-meter Level Precise Point Positioning of Low-Cost Smartphones

open access: yesNavigation, 2023
The prevalence of inexpensive global navigation satellite system (GNSS) chips that facilitate the performance of carrier phase measurements has provided hardware that can be used as the foundation for implementing precise point positioning (PPP) of low ...
Jiale Wang   +4 more
doaj   +1 more source

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