Results 51 to 60 of about 72,223 (218)

FY3E GNOS II GNSS Reflectometry: Mission Review and First Results

Remote Sensing, 2022
FengYun-3E (FY3E), launched on 5 July 2021, is one of China’s polar-orbiting meteorological satellite series. The GNOS II onboard FY3E is an operational GNSS remote sensor that for the first time combines GNSS radio occultation (GNSS RO) and GNSS ...
Guanglin Yang, Weihua Bai, Jinsong Wang, Xiuqing Hu, Peng Zhang, Yueqiang Sun, Na Xu, Xiaochun Zhai, Xianjun Xiao, Junming Xia, Feixiong Huang, Cong Yin, Qifei Du, Xianyi Wang, Yuerong Cai, Xiangguang Meng, Guangyuan Tan, Peng Hu, Congliang Liu   +18 more
doaj   +1 more source

Comparison and Synergy of BPSK and BOC Modulations in GNSS Reflectometry

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Signals from global navigation satellite systems (GNSSs) have been advocated as opportunities for remote sensing of the Earth. In the multi-GNSS era, signals from different constellation, at different frequency, and under different modulation are ...
Jyh-Ching Juang, Chen-Tsung Lin, Yung-Fu Tsai   +2 more
doaj   +1 more source

Floods From Space: How Remote Sensing, AI, and Cloud Platforms Are Reshaping Disaster Risk Reduction

Journal of Flood Risk Management, Volume 19, Issue 3, September 2026.
ABSTRACT Flooding remains one of the most damaging climate‐related hazards globally, yet flood remote sensing has historically developed largely along sensor‐specific pathways. This review addresses the need for a systematic and decision‐oriented synthesis of how space‐borne remote sensing has evolved toward integrated flood monitoring and disaster ...
Ricky Anak Kemarau, Nurfashareena Muhamad, Aida Soraya Shamsuddin, Zulfaqar Sa'adi, Zaini Sakawi, Oliver Valentine Eboy, Nik Norliati Fitri Md Nor   +6 more
wiley   +1 more source

Low-Cost GNSS-R Altimetry on a UAV for Water-Level Measurements at Arbitrary Times and Locations

Sensors, 2019
Together with direct Global Navigation Satellite System (GNSS) signals, the signals reflected at the water surface can be received by an unmanned aerial vehicle (UAV).
Kaoru Ichikawa, Takuji Ebinuma, Masanori Konda, Kei Yufu   +3 more
doaj   +1 more source

GNSS signal acquisition in the presence of sign transitions [PDF]

, 2009
The next generation of Global Navigation Satellite Systems (GNSS), such as Galileo [1] and GPS modernization [2], will use signals with equal code and bit periods, which will introduce a potential sign transition in each segment of the signal processed ...
Kewen Sun, SUN, KEWEN, Lo Presti, Letizia, Fantino, Maurizio   +3 more
core  

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, Brian Breitsch, Jade Y. Morton   +2 more
wiley   +1 more source

Computation Approach for Quantitative Dielectric Constant from Time Sequential Data Observed by CYGNSS Satellites

Remote Sensing, 2021
This paper describes a computation method for obtaining dielectric constant using Global Navigation Satellite System reflectometry (GNSS-R) products. Dielectric constant is a crucial component in the soil moisture retrieval process using reflected GNSS ...
Junchan Lee, Sunil Bisnath, Regina S.K. Lee, Narin Gavili Kilane   +3 more
doaj   +1 more source

An Overview of Tsunami Hazards in the Southwest Pacific Ocean

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
The southwest Pacific region is geologically complex and exhibits all the principal causes of tsunami generation. While contemporary events and historical catalogs indicate that trans‐Pacific tsunamis have affected this area (∼18% of tsunamis reported globally), it is unique in that a large part of the tsunami effects over the ∼200‐year historical ...
Jean H. M. Roger, Bruce E. O. Thomas, Jose Borrero, Brook Tozer, Julien Collot, Samuel Etienne, Catherine Chagué, Patrick D. Nunn, Emily M. Lane, Shaun Williams, David Burbidge, Hannah E. Power, William Power, Bernard Pelletier   +13 more
wiley   +1 more source

A Unified Vector Electromagnetic Framework for Ionospheric Scintillation and Polarization Effects in GNSS

Radio Science, Volume 61, Issue 6, June 2026.
Abstract The ionosphere imposes coupled amplitude, phase, and polarization distortions on trans‐ionospheric Global Navigation Satellite System (GNSS) signals, reflecting the structure and dynamics of electron‐density irregularities. Classical weak‐scatter theory provides a mature framework for interpreting amplitude and phase scintillation, but these ...
T. Durgonics, S. S. Beeck
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, Weber, Georg, Steigenberger, Peter, Hugentobler, Urs, Montenbruck, Oliver, Khachikyan, Robert, Mervart, Leos   +6 more
core