Results 41 to 50 of about 266,964 (192)
Earth, Planets and Space, 2022 As part of the International GNSS Service (IGS) multi-GNSS Pilot Project (MGEX), precise orbit and clock products for multi-GNSS constellations have been submitted by several analysis centers (ACs) since 2012.
Guo Chen +5 more
doaj +1 more source
Satellite Navigation, 2022 Over the past years the International Global Navigation Satellite System (GNSS) Monitoring and Assessment System (iGMAS) Wuhan Innovation Application Center (IAC) dedicated to exploring the potential of multi-GNSS signals and providing a set of products ...
Xingxing Li +6 more
doaj +1 more source
, 2017 This paper presents an investigation into the performance of real-time Global Navigation Satellite Systems (GNSS) Precise Point Positioning (PPP) in New Zealand.
K. Harima, S. Choy, C. Rizos, S. Kogure
semanticscholar +1 more source
Remote Sensing, 2018 Ionosphere research using the Global Navigation Satellite Systems (GNSS) techniques is a hot topic, with their unprecedented high temporal and spatial sampling rate. We introduced a new GNSS Ionosphere Monitoring and Analysis Software (GIMAS) in order to
Qiang Zhang, Qile Zhao
doaj +1 more source
, 2017 Since October 2011, the Russian GLObal NAvigation Satellite System (GLONASS) has been revitalized and is now fully operational with 24 satellites in orbit. It is critical to assess the benefits and problems of using GLONASS observations (i.e.
Fenn Zhou
semanticscholar +1 more source
Assessing GNSS Reflectometry for High‐Latitude 3D Ionospheric Imaging
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract This study investigates whether Global Navigation Satellite System Reflectometry (GNSS‐R) measurements from low‐Earth‐orbit (LEO) satellites can improve three‐dimensional (3D) ionospheric electron density imaging, with a focus on high‐latitude regions. Conventional ionospheric tomography is limited by sparse ground‐based receiver coverage over
Brenna Royersmith +2 more
wiley +1 more source
IGS-MGEX: Preparing the Ground for Multi-Constellation GNSS Science [PDF]
, 2013 With a total of four new and emerging constellations (BeiDou, Galileo, QZSS, IRN SS) as well as the ongoing modernization of GPS and GLONASS the world of satellite navigation presently experiences dramatic changes.
Langley, Richard +6 more
core
Real‐Time Monitoring of Ionosphere VTEC Using Multi‐GNSS Carrier‐Phase Observations and B‐Splines
Space Weather, 2021 Monitoring the Vertical Total Electron Content (VTEC) of the ionosphere is important for applications ranging from navigation to detection of space weather events.
Eren Erdogan +4 more
doaj +1 more source
, 2016 Single-frequency precise point positioning (PPP) presents a cost-effective positioning technique for a large number of users. However, it possesses low positioning accuracy and convergence time compared with the dual-frequency PPP.
Mahmoud Abd Rabbou, A. El-Rabbany
semanticscholar +1 more source
Space Weather, Volume 24, Issue 8, August 2026.Abstract This study uses observation data from multi‐constellation (GPS/GLONASS/Galileo/BeiDou) ground‐based Global Navigation Satellite Systems (GNSS) networks and a non‐integrated spherical harmonic function modeling methodology to develop an ionospheric Total Electron Content (TEC) model with high spatiotemporal resolution (1° × 1° in longitude and ...
Heng Xu +5 more
wiley +1 more source