Results 1 to 10 of about 437,774 (329)

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

Positioning with stationary emitters in a two-dimensional space-time [PDF]

open access: yes, 2006
The basic elements of the relativistic positioning systems in a two-dimensional space-time have been introduced in a previous work [Phys. Rev. D {\bf 73}, 084017 (2006)] where geodesic positioning systems, constituted by two geodesic emitters, have been ...
B. Coll   +6 more
core   +3 more sources

Accuracy of a magnetic resonance imaging‐based 3D printed stereotactic brain biopsy device in dogs [PDF]

open access: yes, 2020
Background: Brain biopsy of intracranial lesions is often necessary to determine specific therapy. The cost of the currently used stereotactic rigid frame and optical tracking systems for brain biopsy in dogs is often prohibitive or accuracy is not ...
Böttcher, Peter   +8 more
core   +1 more source

Effectiveness of observation-domain sidereal filtering for GPS precise point positioning [PDF]

open access: yes, 2015
Sidereal filtering is a technique used to reduce errors caused by multipath in the positioning of static receivers via the Global Positioning System (GPS).
Atkins, C, Ziebart, M
core   +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

Multi-Frequency Precise Point Positioning using GPS and Galileo data with smoothed ionospheric corrections [PDF]

open access: yes, 2018
The poor signal visibility and continuity associated with urban environments together with the slow convergence/reconvergence time of Precise Point Positioning (PPP), usually makes PPP unsuitable for land navigation in cities.
Basile, Francesco   +4 more
core   +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

Analysis of the time series of station coordinates - a comparison of the network and PPP approach [PDF]

open access: yes, 2015
Based on the example of fourteen selected permanent GNSS stations of the EPN (EUREF Permanent Network) the differences of time variations of coordinates – velocities – resulting from the network and PPP (Precise Point Positioning) solution are studied.
Douša, Jan   +3 more
core   +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

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