Results 61 to 70 of about 3,815 (246)

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

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

Monitoring Flood Inundation Dynamics From Space

Reviews of Geophysics, Volume 64, Issue 1, March 2026.
Abstract With the increasing intensity and frequency of flood events worldwide, the need for accurate and timely inundation mapping has never been more critical. Large‐scale flood extent estimations are vital for coordinating effective disaster response, facilitating recovery, and building future resilience.
C. Campo, P. Tamagnone, S. Choy, T. D. Tran, G. J.‐P. Schumann, Y. Kuleshov   +5 more
wiley   +1 more source

Remote Sensing of Forest Biomass Using GNSS Reflectometry [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
In this study, the capability of Global Navigation Satellite System Reflectometry in evaluating forest biomass from space has been investigated by using data coming from the TechDemoSat-1 (TDS-1) mission of Surrey Satellite Technology Ltd. and from the Cyclone Satellite System (CyGNSS) mission of NASA.
Emanuele Santi, Simonetta Paloscia, Simone Pettinato, Giacomo Fontanelli, Maria Paola Clarizia, Davide Comite, Laura Dente, Leila Guerriero, Nazzareno Pierdicca, Nicolas Floury   +9 more
openaire   +7 more sources

Evaluating SWOT in the Coastal Zone: Comparisons With Tide Gauge and Airborne LiDAR in the Bristol Channel and Severn Estuary, UK

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Traditional nadir altimeters struggle with coastal water surface elevation (WSE) measurement and fine‐scale river‐estuary interactions, due to land‐water signal interference and their wide inter‐track spacing. The wide‐swath Surface Water and Ocean Topography (SWOT) mission, using a new Ka‐band radar interferometer, aims to address these ...
Youtong Rong, Paul Bates, Jeff Neal, Paul Bell, Christine Gommenginger, Ian Dougal Lichtman, Christopher Banks, Francisco J. M. Calafat, Adrien Martin, Jennifer Brown, Richard Cooke, Christopher Balfour, Michela De Dominicis, Marta Payo Payo, Simon Williams, Laurent Amoudry, Stephen Chuter, Simon Neill, Jude Chisholm, Colin J. Gleason, John Kupiec, Matt Lewis   +21 more
wiley   +1 more source

Implementation of a GNSS-R payload based on software defined radio for the 3CAT-2 mission [PDF]

, 2016
©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Amézaga Sarries, Adrià, Camps Carmona, Adriano José, Carreno-Luengo, Hugo, Hyuk, Park, Olivé Muñiz, Roger   +4 more
core   +2 more sources

TGCAT—A Tool to Analyse the Content of Sea Level Data Portals

Geoscience Data Journal, Volume 13, Issue 1, January 2026.
TGCAT is an online tool (www.sonel.org/tgcat) to help sea level data providers, data aggregators, and data users to visualise available tide gauge datasets. It is aimed to improve data referencing and discoverability in the global tide gauge data centres. The code has been fully developed in Python and is open‐source.
Laurent Testut, Adrien Laval, Clémence Chupin, Mikaël Guichard, Begoña Pérez Gómez   +4 more
wiley   +1 more source

Sea target detection using spaceborne GNSS-R delay-doppler maps: theory and experimental proof of concept using TDS-1 data [PDF]

, 2017
© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Camps Carmona, Adriano José, Di Simone, Alessio, Hyuk, Park, Riccio, Daniele   +3 more
core   +2 more sources

A Modified Hierarchical Vision Transformer for Soil Moisture Retrieval From CYGNSS Data

Water Resources Research, Volume 62, Issue 1, January 2026.
Abstract This research introduces a new deep learning (DL) framework, multi‐head self‐attention‐aided vision Transformer (MSA‐ViT), for soil moisture (SM) retrieval using Cyclone Global Navigation Satellite System (CYGNSS) data. We first assess the sensitivity of CYGNSS reflectivity (Γ) $({\Gamma })$ to SM, demonstrating a strong physical linkage ...
Qingyun Yan, Yuhan Chen, Yuanjin Pan, Shuanggen Jin, Weimin Huang   +4 more
wiley   +1 more source

Remote sensing and its applications using GNSS reflected signals: advances and prospects

Satellite Navigation
The Global Navigation Satellite Systems (GNSS), including the US’s GPS, China’s BDS, the European Union’s Galileo, and Russia’s GLONASS, offer real-time, all-weather, any-time, anywhere and high precision observations by transmitting L band signals ...
Shuanggen Jin, Adriano Camps, Yan Jia, Feng Wang, Manuel Martin-Neira, Feixiong Huang, Qingyun Yan, Shuangcheng Zhang, Zhongyu Li, Komi Edokossi, Dongkai Yang, Zhiyu Xiao, Zhongmin Ma, Weihua Bai   +13 more
doaj   +1 more source