Results 51 to 60 of about 266,964 (192)

Observable-specific phase biases of Wuhan multi-GNSS experiment analysis center’s rapid satellite products

Satellite Navigation, 2022
Precise Point Positioning (PPP) with Ambiguity Resolution (AR) is an important high-precision positioning technique that is gaining popularity in geodetic and geophysical applications. The implementation of PPP-AR requires precise products such as orbits,
Jianghui Geng, Qiyuan Zhang, Guangcai Li, Jingnan Liu, Donglie Liu   +4 more
doaj   +1 more source

A New Strategy for Improving Multi‐Frequency PPP‐RTK Ionospheric Correction Availability and User Performance in Low‐ and Middle‐Latitudes

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract High‐precision regional ionospheric correction products are essential for achieving accurate and fast‐convergence solutions in Precise Point Positioning Real‐Time Kinematic (PPP‐RTK). For users in low‐ and middle‐latitudes, PPP‐RTK server narrow‐lane (NL) ambiguity resolution (AR) typically requires more than 10 min, which largely affects the ...
Pan Li, Shitong Chen, Jiahuan Hu, Xin Xie, Jiadi Dai, Bao Shu, Guanwen Huang   +6 more
wiley   +1 more source

Avaliação do desempenho dos sistemas GPS e GLONASS no posicionamento por ponto preciso, combinados e individualmente [PDF]

, 2016
Este trabalho visa avaliar o desempenho dos sistemas GLONASS (Global'naya Navigatsionnay Sputnikovaya Sistema), GPS (Global Positioning System) e o uso combinado de ambos sistemas em diferentes latitudes, utilizando o serviço de Posicionamento por Ponto ...
Ventorim, Bruno Guimarães, Poz, William Rodrigo Dal, Ventorim,Bruno Guimarães, Dal Poz,William Rodrigo   +3 more
core   +3 more sources

Drivers of Mid‐Latitude Quiet‐Time Longitude Variations in Ionospheric Density

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract The aim of this study is to provide an observational benchmark of mid‐latitude quiet‐time variability in winds, O/N2, and TEC across longitude and local time to provide a foundation for future model–data comparison studies. The quiet‐time ionospheric structure is not uniform but rather exhibits pronounced longitudinal and local‐time ...
K. R. Greer, L. P. Goncharenko, V. L. Harvey, C. Cullens   +3 more
wiley   +1 more source

GPS and GLONASS Static and Kinematic PPP results [PDF]

, 2013
Precise point positioning (PPP) involves observations from a single global navigation satellite system (GNSS) receiver and benefits of satellite orbit and clock products obtained from the global infrastructure of permanent stations.
Berné Valero, José Luis, Padin Devesa, Jorge, Martín Furones, Ángel Esteban, Anquela Julián, Ana Belén   +3 more
core   +1 more source

Near real-time estimation of ionosphere vertical total electron content from GNSS satellites using B-splines in a Kalman filter [PDF]

Annales Geophysicae, 2017
Although the number of terrestrial global navigation satellite system (GNSS) receivers supported by the International GNSS Service (IGS) is rapidly growing, the worldwide rather inhomogeneously distributed observation sites do not allow the generation
E. Erdogan, M. Schmidt, F. Seitz, M. Durmaz   +3 more
doaj   +1 more source

Assessment of Ionospheric Model Performance Over the US During the Extreme G5 2024 Mother's Day Geomagnetic Storm

Space Weather, Volume 24, Issue 5, May 2026.
Abstract This study evaluates 17 ionospheric models' performance over the Continental United States (CONUS) during the 2024 Mother's Day geomagnetic storm, using ground‐based GNSS Total Electron Content (TEC) and single‐frequency (SF) precise Single Point Positioning (SPP) technique. The storm produced significant positive storm effects during its main
Min‐Yang Chou, Jia Yue, Deimos Ibáñez Segura, J. D. Huba, Tzu‐Wei Fang, Charles Lin, Chi‐Yen Lin, Aaron Bukowski, Aaron Ridley, Ivan Galkin, Dieter Bilitza, Jack Wang, Mohammed Mainul Hoque, Maksym Petrenko, Paul Dimarzio, Maria M. Kuznetsova   +15 more
wiley   +1 more source

GLOBAL BİR AĞDA GPS/GLONASS, GPS ve GLONASS SONUÇLARININ KARŞILAŞTIRILMASI  [PDF]

, 2010
Positioning with satellites increasing its importance day by day in paralel with the technological developments. Nowadays, GPS comes to mind first, as a global positioning system. It is the most developed and prefered satellite system.
İNAL, Cevat, ALÇAY, Salih
core  

Performance Evaluation of Troposphere Estimated from Galileo-Only Multi-Frequency Observations

Remote Sensing, 2020
The tropospheric delays estimated from the Global Navigation Satellite System (GNSS) have been proven to be an efficient product for monitoring variations of water vapor, which plays an important role in meteorology applications.
Lewen Zhao, Pavel Václavovic, Jan Douša   +2 more
doaj   +1 more source

Regional Ionospheric Maps with Quad-Constellation Raw Observations as Applied to Single-Frequency PPP

Remote Sensing, 2022
Ionospheric delay is one of the most problematic errors in single-frequency (SF) global navigation satellite system (GNSS) data processing. Global/regional ionospheric maps (GIM/RIM) are thus vitally important for positioning users. Given the coexistence
Wei Li, Kaitian Yuan, Robert Odolinski, Shaocheng Zhang   +3 more
doaj   +1 more source