Results 141 to 150 of about 740 (180)

Mobile GNSS reflectometry measurements

2020
<p>A major benefit of ground-based GNSS reflectometry (GNSS-R) over e.g. traditional tide gauge installations is the lower cost and basically maintenance-free operations. Still, a geodetic GNSS antenna is not exactly free of charge, so using cheaper equipment can make the technology available to even more people ...
Joakim Strandberg, Rüdiger Haas
openaire   +1 more source

Expanding the Scope of GNSS Reflectometry

2023
Another contribution is the exploration of new modes of GNSS-R, notably a backscattering mode. This includes experiments with new use cases using raw TDS-1 data and the introduction of a backscatter reflection point prediction tool. A new phenomenon termed ""Specular Point Intrusions"", which will have implications for the implementation of the method ...
openaire   +2 more sources

Theoretical Fundamentals of GNSS Reflectometry

2021
GNSS reflectometry usually relies on a model or a criterion which is established in advance, to measure geophysical parameters or detect natural phenomena or man-made objects. The models and criteria can be theoretical or empirical depending on the application scenario and the observation platform.
openaire   +1 more source

The rise of GNSS reflectometry for Earth remote sensing

2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015
The Global Navigation Satellite System (GNSS) reflectometry, i.e. GNSS-R, is a novel remote-sensing technique first published in [1] that uses GNSS signals reflected from the Earth's surface to infer its surface properties such as sea surface height (SSH), ocean winds, sea-ice coverage, vegetation, wetlands and soil moisture, to name a few.
Cinzia Zuffada, Zhijin Li, Son V. Nghiem, Steve Lowe, Rashmi Shah, Maria Paola Clarizia, Estel Cardellach   +6 more
openaire   +1 more source

GNSS Reflectometry and Applications

2017
© Springer International Publishing AG 2018. When positioning with GNSS, multipath signal is a reflected GNSS signal that is a nuisance and as such needs to be eliminated. Whereas this reflected signal on the one hand is a nuisance for positioning, for environmental monitoring purposes, it could be useful in monitoring sea-wind retrieval, seawater ...
openaire   +2 more sources

TDS-1 GNSS Reflectometry

2018
This study presents the development and a systematic evaluation study of GNSS reflectometry wind speeds. After establishing a wind speed retrieval algorithm, UK TechDemoSat-1 (TDS-1) derived winds, from May 2015 to July 2017, are compared to the Advanced Scatterometer (ASCAT).
Asgarimehr, Milad (Dr.-Ing.), Wickert, Jens (Prof. Dr.), Reich, Sebastian (Prof.)   +2 more
openaire   +1 more source

Ship detection using GNSS-reflectometry in backscattering configuration

2018 IEEE Radar Conference (RadarConf18), 2018
The chance of exploiting the Global Navigation Satellite Systems-Reflectometry (GNSS-R) remote sensing technology in the field of maritime surveillance and ship traffic monitoring has been explored in the very recent past. The conventional bistatic GNSS-R is based on the acquisition of GNSS navigation messages in a forward-scattering geometry, where ...
DI Simone A., Braca P., Millefiori L. M., Willett P.   +3 more
openaire   +2 more sources

Wind retrieval for GNSS reflectometry from techdemosat-1

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
The main purpose of this study is to propose and validate a new algorithm for wind speed retrieval over the ocean using Global Navigation Satellite System-Reflectometry (GNSS-R). The proposed method is based on a Least Squares (LS) estimation from the volume of the scattered power function.
Generoso Giangregorio, Pia Addabbo, Carmela Galdi, Maurizio di Bisceglie   +3 more
openaire   +1 more source

Experimental and modelled GNSS Reflectometry response over land

2018 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2018
The applications of spaceborne GNSS reflectometry data over land are investigated in this work using the data collected by the UK TechDemoSat experimental mission. In order to quantify the sensitivity of the GNSS reflections to biomass and soil moisture from real data it is necessary to extract a quantity, like the surface reflectivity, as much as ...
Pierdicca, Nazzareno, Guerriero, Leila, Comite, Davide, Costantim, Fabiano, Dente, Laura   +4 more
openaire   +1 more source

Feasibility Analysis of GNSS-Reflectometry for Monitoring Coastal Hazards

Remote Sensing, 2021
Jihye Park, Eunju Lee, Sungwon Shin
exaly