Results 51 to 60 of about 1,482 (190)

Assessment of Multi-Frequency PPP Ambiguity Resolution Using Galileo and BeiDou-3 Signals

Remote Sensing, 2021
From network RTK to PPP-RTK, it is highly expected that high-precision positioning within a few minutes can be achieved with a sparse reference network.
Jiang Guo, Qiyuan Zhang, Guangcai Li, Kunlun Zhang   +3 more
doaj   +1 more source

Satellite Navigation for the Age of Autonomy

, 2020
Global Navigation Satellite Systems (GNSS) brought navigation to the masses. Coupled with smartphones, the blue dot in the palm of our hands has forever changed the way we interact with the world.
Chan, Bryan, Goel, Ashish, Gunning, Kazuma, Manning, Brian, Martin, Jerami, Neish, Andrew, Perkins, Adrien, Reid, Tyler G. R., Tarantino, Paul   +8 more
core   +1 more source

Analysis of 1-Hz GPS data for the estimation of long-period surface motion of Tohoku-Oki Mw9.0 2011 earthquake [PDF]

, 2016
The GPS displacement time series are today mostly used for the estimation of the transient (period
Clotaire, Michel, Houlié, Nicolas, Meindl, Michel, Psimoulis, Panos, Rothacher, Markus   +4 more
core   +2 more sources

An analytical study of PPP-RTK corrections: precision, correlation and user-impact [PDF]

, 2015
PPP-RTK extends the PPP concept by providing single-receiver users, next to orbits and clocks, also information about the satellite phase and code biases, thus enabling single-receiver ambiguity resolution.
A Lannes, A Lannes, A. Khodabandeh, B Hofmann-Wellenhof, B Li, B Zhang, D Odijk, D Odijk, D Odijk, DA Grejner-Brzezinska, DA Grejner-Brzezinska, G Blewitt, HV Henderson, J Geng, J Geng, JF Zumberge, M Ge, P Wielgosz, P. J. G. Teunissen, PJG Teunissen, PJG Teunissen, PJG Teunissen, PTG Teunissen, S Banville, S Loyer, S Verhagen, W Bertiger, X Li, X Li, X Zhang   +29 more
core   +1 more source

MSE-impact of PPP-RTK ZTD estimation strategies

Advances in Space Research, 2018
In PPP-RTK network processing, the wet component of the zenith tropospheric delay (ZTD) cannot be precisely modelled and thus remains unknown in the observation equations. For small networks, the tropospheric mapping functions of different stations to a given satellite are almost equal to each other, thereby causing a near rank-deficiency between the ...
Wang, K. (author), Khodabandeh, A. (author), Teunissen, P.J.G. (author)   +2 more
openaire   +5 more sources

Application of Atmospheric Augmentation for PPP-RTK with Instantaneous Ambiguity Resolution in Kinematic Vehicle Positioning

Remote Sensing
The long convergence time and non-robust positioning accuracy are the main factors limiting the application of precision single-point positioning (PPP) in kinematic vehicle navigation. Therefore, a dual/triple-frequency multi-constellation PPP-RTK method
Zhu-Feng Shao, Dun-Wei Gong, Zi-Yang Qu, Sheng-Yi Xu, Xiao-Ting Lei, Zhen Li   +5 more
doaj   +1 more source

PERFORMANCE EVALUATION OF LOW-COST PRECISION POSITIONING METHODS FOR FUTURE PORT APPLICATIONS [PDF]

, 2021
In recent times, a lot of research has been conducted to improve the accuracy of various positioning systems. The motivation behind this trend is to ensure high quality GNSS services for various applications.
Onyebuchi, Dalbert
core  

Tightly coupled multi-frequency PPP-RTK/INS integration model and its application in an urban environment

Geo-spatial Information Science
The Precise Point Positioning-Real Time Kinematic (PPP-RTK) technique, which provides centimeter-level positioning with instantaneous ambiguity resolution, is considered as a potential tool for intelligent vehicle applications.
Hang Zhu, Yibin Yao, Xiongwei Ma, Qi Zhang   +3 more
doaj   +1 more source

Characterizing North‐South Ionospheric Gradients During Geomagnetic Storms: A Variogram Enhancement for Wide Area Ionospheric Models

Space Weather, Volume 24, Issue 1, January 2026.
Abstract The intensified solar maximum of Cycle 25 has heightened space weather risks to Global Navigation Satellite Systems (GNSS), where geomagnetic storms critically challenge Positioning, Navigation, and Timing (PNT) availability. Current wide‐area ionospheric models may fail to resolve extreme latitudinal Total Electron Content (TEC) gradients ...
Tong Liu, Yiping Jiang, Bo Chen, Jian Liu, Yufang He, Wu Chen   +5 more
wiley   +1 more source

Regional Medium‐Scale Traveling Ionospheric Disturbance Propagation Model Based on BDS GEO Satellites

Space Weather, Volume 24, Issue 1, January 2026.
Abstract Accurate modeling of traveling ionospheric disturbances (TIDs) is essential for characterizing their spatiotemporal variations and mitigating their effects on Global Navigation Satellite System (GNSS) precise positioning. This study develops a regional medium‐scale TID (MSTID) propagation model using BeiDou geostationary orbit (GEO) total ...
Dengkui Mei, Xiaohong Zhang, Xiaodong Ren, Xuan Le, Wentao Yang, Ahmed Abdelaziz   +5 more
wiley   +1 more source