Results 251 to 260 of about 15,182,981 (294)

Experimental study for GNSS-R polarimetry

2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
GNSS reflectomtry (GNSS-R) is a remote sensing methodology in which the GNSS satellites are applied for signal transmitters. In GNSS-R studies, an interference strategy is popular. The interference method uses interactions between direct signals from the GNSS satellites and reflected signals by sensing targets.
Ryuta Kato, Hirobumi Saito, Seisuke Fukuda   +2 more
openaire   +1 more source

Scattering Models for Gnss-R in Inland Waters

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
Spaceborne GNSS reflectometry allows for the production of maps of rivers, wetlands and inundations using a significant change in the reflected signal while the ground track transects those inland water basins. We performed modeling of both coherent and non-coherent DDMs from Okeechobee Lake in Florida for overpasses by CYGNSS observatories under ...
Valery U. Zavorotny, Eric Loria
openaire   +1 more source

Delay super resolution for GNSS-R

2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
Global Navigation Satellite System Reflectometry (GNSS-R) is a new approach for earth observation using signals of opportunity in a bistatic configuration. The system, in the configuration of interest, exploits the 10 bits PN sequence of the GPS system to generate Delay/Doppler maps that are useful for monitoring the sea state. One of the open problems
Maria Paola Clarizia, Maurizio di Bisceglie, Carmela Galdi, Christine Gommenginger, Luciano Landi   +4 more
openaire   +2 more sources

Status and perspectives of GNSS-R at ESA

2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
This paper presents an overview of the activities currently being undertaken by the European Space Agency in the field of GNSS reflectometry. Furthermore, the salient features of Europe's Galileo project with respect to the applicability of the signals for the purpose of GNSS-R are given.
Christopher Buck, Salvatore D'Addio
openaire   +2 more sources

An Adaptive Window for GNSS-R Stare Processing

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
Using spaceborne platforms, stare processing of Delay Doppler Maps (DDM) is a powerful technique that enables up to 20 contiguous DDMs to be combined to estimate the sea state at a single point on the ocean surface. This technique avoids over 100km of blurring in the spatial domain that would occur if the specular window in these contiguous DDMs were ...
Benjamin J. Southwell, Andrew G. Dempster   +1 more
openaire   +1 more source

Snow monitoring using GNSS-R techniques

2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
GNSS-R techniques are currently being studied to remotely sense a number of geophysical parameters over different types of surfaces [1-6]. The Interference Pattern Technique (IPT) is based on the measurement of the interference pattern of the GPS direct and reflected signals, after reflecting over the surface, as the GPS satellites move.
Nereida Rodriguez-Alvarez, Albert Aguasca, Enric Valencia, Xavier Bosch-Lluis, Isaac Ramos-Pérez, Hyuk Park 0001, Adriano Camps, Mercè Vall-Llossera   +7 more
openaire   +3 more sources

Oil slicks detection using GNSS-R

2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
Global Navigation Satellite Systems' signals reflectometry, originally envisioned for ocean altimetry, has become a promising remote sensing technique. Among other applications, it has been proposed for ocean scatterometry for sea state determination. Most of the proposed scatterometry techniques have as a product an average sea state descriptor over ...
Enric Valencia, Adriano Camps, Hyuk Park 0001, Nereida Rodriguez-Alvarez, Xavier Bosch-Lluis, Isaac Ramos-Pérez   +5 more
openaire   +1 more source

Wetland GNSS-R measurements from aircraft

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
Characterizing, understanding, and projecting changes in atmospheric methane and terrestrial water storage require information about wetland dynamics, which remains a major gap in existing knowledge. Despite recent advances in satellite monitoring techniques, dynamic wetland mapping needs to be improved for more accurate global inventories and also to ...
Estel Cardellach, Fran Fabra, Weiqiang Li 0001, Serni Ribo, Antonio Rius, Rashmi Shah, Clara C. Chew, Son V. Nghiem, Maximilian Semmling   +8 more
openaire   +2 more sources

Study of accurate ocean-altimetry with GNSS-R

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
The paper explored a method to obtain accurate lake surface heights using Global Navigation Satellite System (GNSS) Coarse/Acquisition Code (C/A)reflected from the ocean surface. The method is referred to as Global Navigation Satellite System-Reflection (GNSS-R) (C/A) code altimetry.
Yun Zhang 0012, Fengling Liu, Qiming Gu, Wanting Meng, Zhonghua Hong, Yanling Han   +5 more
openaire   +1 more source

Ionospheric Scintillation Monitoring Using GNSS-R?

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
Peer ...
Camps Carmona, Adriano José, Hyuk, Park, Juan Zornoza, José Miguel, Sanz Subirana, Jaume, González Casado, Guillermo, Barbosa, José, Fabbro, V, Lemorton, J, Orús Pérez, Raul   +8 more
openaire   +3 more sources