Results 51 to 60 of about 4,586 (165)

A full-polarization GNSS-R Delay-Doppler-Map (DDM) simulator for bare soil freeze/thaw process detection

Geoscience Letters, 2020
The soil freeze/thaw processes have a significant impact on the surface energy and moisture balance, which play a key role in ecosystem diversity and productivity. The air-/space-borne Global Navigation Satellite System (GNSS)-Reflectometry (GNSS-R) is a
Xuerui Wu, Shuanggen Jin, Xinqiu Ouyang
doaj   +1 more source

RFI Analysis and Mitigation in Airborne GNSS-R Campaign

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
Peer ...
Querol Borràs, Jorge, Onrubia Ibáñez, Raúl, Pascual Biosca, Daniel, Castellví Esturi, Jordi, Hyuk, Park, Camps Carmona, Adriano José   +5 more
openaire   +2 more sources

Preliminary error budget of a GNSS-R spaceborne mission

2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
Reflectometry using Global Navigation Satellite System's (GNSS) opportunity signals was originally conceived for altimetry [1], but it has been demonstrated today that it can be applied to sea state determination, soil moisture, vegetation, snow monitoring... So far, GPS signals scattered over the Earth's surface have been cross-correlated with a local
Camps Carmona, Adriano José, Hyuk, Park, Valencia Domènech, Enric, Rius, Antonio   +3 more
openaire   +2 more sources

Intercomparison of Tianmu-1 and CYGNSS Global Land Observations for Harmonization

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Spaceborne global navigation satellite system-reflectometry (GNSS-R) offers a unique opportunity for low-cost, all-weather land surface monitoring. While land observations can theoretically achieve subkilometer resolution, irregular sampling and the lack
Wentao Yang, Zhongmin Ma, Hyuk Park, Adriano Camps, Fei Guo, Xiaohong Zhang, Xiaojun Li, Jean-Pierre Vigneron   +7 more
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UAV-Based GNSS-R for Water Detection as a Support to Flood Monitoring Operations: A Feasibility Study

Applied Sciences, 2019
Signals from global navigation satellite systems (GNSS) can be utilized as signals of opportunity in remote sensing applications. Geophysical properties of the earth surface can be detected and monitored by processing the back-scattered GNSS signals from
Rayan Imam, Marco Pini, Gianluca Marucco, Fabrizio Dominici, Fabio Dovis   +4 more
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A Real-Time GNSS-R System for Monitoring Sea Surface Wind Speed and Significant Wave Height. [PDF]

Sensors (Basel), 2022
Xing J, Yu B, Yang D, Li J, Shi Z, Zhang G, Wang F.   +6 more
europepmc   +1 more source

From field experiments to salinity products: a tribute to the contributions of Jordi Font to the SMOS mission

Scientia Marina, 2016
This article summarizes some of the activities in which Jordi Font, research professor and head of the Department of Physical and Technological Oceanography, Institut de Ciències del Mar (CSIC, Spanish National Research Council) in Barcelona, has been ...
Adriano Camps, Carolina Gabarró, Mercè Vall-llossera, Sebastià Blanch, Albert Aguasca, Francesc Torres, Ignasi Corbella, Nuria Duffo, Antonio Turiel, Marcos Portabella, Joaquim Ballabrera-Poy, Verónica González-Gambau, Justino Martínez, Ramón Villarino, Luís Enrique, Alessandra Monerris, Xavier Bosch, Roberto Sabia, Marco Talone, Maria Piles, Míriam Pablos, Enric Valencia   +21 more
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Separation of Overlapped Direct and Reflected Waveforms for Low-Altitude UAV-Based GNSS-R Altimetry

Remote Sensing
GNSS reflectometry (GNSS-R) altimetry has been widely used for retrieving surface elevation over oceans, cryosphere, and land. Recently, UAV-borne GNSS-R systems have gained attention due to their flexibility for low-altitude and localized observations ...
Ziyin Xu, Xianyi Wang, Junming Xia, Yueqiang Sun, Cheng Liu, Zhuoyan Wang, Yusen Tian, Tongsheng Qiu, Dongwei Wang   +8 more
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First Evaluation of Topography on GNSS-R: An Empirical Study Based on a Digital Elevation Model

Remote Sensing, 2019
Understanding the effects of Earth’s surface topography on Global Navigation Satellite Systems Reflectometry (GNSS-R) space-borne data is important to calibrate experimental measurements, so as to provide accurate soil moisture content (SMC ...
Hugo Carreno-Luengo, Guido Luzi, Michele Crosetto   +2 more
doaj   +1 more source

Physics-Constrained Spatio-Temporal Attention FusionGAN: End-to-End Gridded Sea Surface Wind Fusion Over China Seas From Multimission GNSS-R Observations

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
To fully exploit the advantages of GNSS-R small satellites (large quantity, short revisit cycle) and address key challenges of multisource GNSS-R data—track-wise distribution, uneven spatial coverage, and observation gaps, this study proposes a ...
Xiaohui Li, Xinhai Han, Jingsong Yang, Feixiong Huang, Jiuke Wang, Guoqi Han, Weiqiang Li   +6 more
doaj   +1 more source