Results 51 to 60 of about 17,936 (197)

Water surface height determination with a GPS wave glider: a demonstration in Loch Ness, Scotland [PDF]

open access: yes, 2016
A geodetic GPS receiver has been installed on a Wave Glider, an unmanned water surface vehicle. Using kinematic precise point positioning (PPP) GPS, which operates globally without directly requiring reference stations, surface heights are measured with ~
Foden, P.R.   +5 more
core   +1 more source

Cube: An Open-Source Software for Clock Offset Estimation and Precise Point Positioning with Ambiguity Resolution

open access: yesRemote Sensing
Precise point positioning (PPP) is a prevalent, high-precision spatial absolution positioning method, and its performance can be enhanced by ambiguity resolution (AR).
Shuai Liu   +4 more
doaj   +1 more source

Kinematic Precise Point Positioning Using Multi-Constellation Global Navigation Satellite System (GNSS) Observations

open access: yesISPRS International Journal of Geo-Information, 2017
Multi-constellation global navigation satellite systems (GNSSs) are expected to enhance the capability of precise point positioning (PPP) by improving the positioning accuracy and reducing the convergence time because more satellites will be available ...
Xidong Yu, Jingxiang Gao
doaj   +1 more source

Multi-constellation GNSS precise point positioning with multi-frequency raw observations and dual-frequency observations of ionospheric-free linear combination

open access: yesSatellite Navigation, 2020
Precise point positioning (PPP) is famous for its capability of high-precision positioning with just one station as long as the receiver can receive global navigation satellite system (GNSS) signals.
Xiangdong An   +2 more
doaj   +1 more source

Application of “Galileo High Accuracy Service” on Single-Point Positioning

open access: yesSensors, 2023
Employment of precise positioning techniques will enable low-cost receivers for a variety of applications. The complexity of techniques such as Precise Point Positioning (PPP), or differential techniques that require the use of external sources of ...
Antonio Angrisano   +4 more
doaj   +1 more source

Influence of ionospheric perturbations in GPS time and frequency transfer [PDF]

open access: yes, 2009
The stability of GPS time and frequency transfer is limited by the fact that GPS signals travel through the ionosphere. In high precision geodetic time transfer (i.e. based on precise modeling of code and carrier phase GPS data), the so-called ionosphere-
Bassiri   +14 more
core   +1 more source

High rate 30 seconds vs clock interpolation in Precise Point Positioning (PPP)

open access: yesGeodetski vestnik, 2016
The development of GNSS technology (Global Navigation Satellite Systems), including GPS technology (Global Positioning System), and the increase of accuracy and precision of the International GNSS Service (IGS) products, make Precise Point Positioning (PPP) technique more and more attractive.
Sorin Nistor, Aurelian Stelian Buda
openaire   +2 more sources

Multi-Scenario Variable-State Robust Fusion Algorithm for Ranging Analysis Framework

open access: yesAgriculture
Integrating modern information technology with traditional agriculture has made agricultural machinery navigation essential in PA (precision agriculture).
Kaiting Xie, Zhaoguo Zhang, Faan Wang
doaj   +1 more source

A Decentralized Processing Schema for Efficient and Robust Real-time Multi-GNSS Satellite Clock Estimation [PDF]

open access: yes, 2019
Real-time multi-GNSS precise point positioning (PPP) requires the support of high-rate satellite clock corrections. Due to the large number of ambiguity parameters, it is difficult to update clocks at high frequency in real-time for a large reference ...
Ge, Maorong   +4 more
core   +1 more source

Real-Time Precise Point Positioning during Outages of the PPP-B2b Service

open access: yesRemote Sensing, 2023
The precise point positioning service on B2b signal (PPP-B2b) is a real-time decimeter-level positioning service provided by the BeiDou-3 Global Navigation Satellite System (BDS-3). The service provides users with high-precision orbit and clock corrections through geostationary orbit (GEO) satellites, which means that the PPP-B2b service would be ...
Yufei Chen   +6 more
openaire   +2 more sources

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