Results 51 to 60 of about 1,523 (198)

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

The Performance of Three-Frequency GPS PPP-RTK with Partial Ambiguity Resolution

Atmosphere, 2022
The correct ambiguity resolution of real-time kinematic precise point positioning (PPP-RTK) plays an essential role in achieving fast, reliable, and high-precision positioning.
Zhongbao Yan, Xiaohong Zhang
doaj   +1 more source

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

Review of code and phase biases in multi-GNSS positioning [PDF]

, 2016
A review of the research conducted until present on the subject of Global Navigation Satellite System (GNSS) hardware-induced phase and code biases is here provided. Biases in GNSS positioning occur because of imperfections and/or physical limitations in
A Al-Shaery, A Leick, A Tetewsky, Anna B. O. Jensen, B Hoffman-Wellenhof, C Cai, C Deng, D Laurichesse, D Odijk, E Sardon, GE Lanyi, Gunnar Hedling, H He, J Chen, J Geng, J Kouba, J Paziewski, J Tegedor, J-M Sleewaegen, JF Zumberge, JM Dow, L Wanninger, M Ge, Martin Håkansson, Milan Horemuz, P Collins, P Teunissen, PJG Teunissen, PJG Teunissen, S Banville, S Banville, S Chuang, S Gleason, W Bertiger, X Li, Y Gao   +35 more
core   +1 more source

Absolute and relative POD of LEO satellites in formation flying: Undifferenced and uncombined approach [PDF]

, 2023
Absolute or relative precise orbit determination (POD) is an essential prerequisite for many low earth orbit (LEO) missions. The POD of LEO satellites typically relays on processing the onboard global navigation satellite system (GNSS) measurements.
Allahvirdizadeh, Amir, El-Mowafy, Ahmed, Huang, Zhiyong, Mi, Xiaolong, Wang, Kan, Yuan, Yunbin, Zhang, Baocheng   +6 more
core   +1 more source

GNSS rapid precise point positioning enhanced by low Earth orbit satellites

Satellite Navigation, 2023
The Low Earth Orbit (LEO) satellites can be used to effectively speed up Precise Point Positioning (PPP) convergence. In this study, 180 LEO satellites with a global distribution are simulated to evaluate their contribution to the PPP convergence.
Ju Hong, Rui Tu, Pengfei Zhang, Rui Zhang, Junqiang Han, Lihong Fan, Siyao Wang, Xiaochun Lu   +7 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

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

RT‐FAIRS: Real‐Time Factor‐Adjusted Ionospheric Residual Statistics Approach for Generating Accuracy Information in Global Ionospheric Maps

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Ionospheric delays remain a major error source in Global Navigation Satellite Systems (GNSS). The International GNSS Service (IGS) provides Global Ionospheric Maps (GIMs) that offer vertical total electron content (VTEC) estimates together with RMS maps as accuracy information.
Ang Li, Ningbo Wang, Manuel Hernández‐Pajares, Ang Liu, Zishen Li, Axel Rülke, Andrzej Krankowski, Heng Yang, Reza Ghoddousi‐Fard, Adam Froń, Zhouyu Zhang   +10 more
wiley   +1 more source