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The GNSS Reflectometry response to the ocean surface
2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016We investigate the Global Navigation Satellite System Reflectometry (GNSS-R) measurements collected by the Space GNSS Receiver-Remote Sensing Instrument (SGR-ReSI) on board the TechDemoSat-1 (TDS-1) satellite. The sensitivity of the SGR-ReSI measurements to the ocean surface winds and waves are characterized.
Paul S. Chang +3 more
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FORMOSAT-7R Mission for GNSS Reflectometry
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019The omnipresence Global Navigation Satellite System (GNSS) signals have not only provided high accuracy navigation but also facilitated many remote sensing missions. In a GNSS reflectometry (GNSS-R) mission, the reflected signals are processed to form delay Doppler maps (DDMs) so that the properties including roughness, ocean wind speed, and soil ...
Jyh-Ching Juang +2 more
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GNSS reflectometry for remote sensing of soil moisture
2015 IEEE 1st International Forum on Research and Technologies for Society and Industry Leveraging a better tomorrow (RTSI), 2015Global Navigation Satellite System Reflectometry (GNSS-R) is an emerging technique for remote sensing of soil surfaces. In this work, the data collected by a GNSS receiver prototype mounted on a small aircraft are analyzed to retrieve soil moisture. Based on GNSS-R bi-static configuration, direct and reflected GPS signals were measured by a right hand (
JIA, YAN +3 more
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Can GNSS Reflectometry Detect Precipitation Over Oceans? [PDF]
Geophysical Research Letters, 2018 AbstractFor the first time, a rain signature in Global Navigation Satellite System Reflectometry (GNSS‐R) observations is demonstrated. Based on the argument that the forward quasi‐specular scattering relies upon surface gravity waves with lengths larger than several wavelengths of the reflected signal, a commonly made conclusion is that the ...
Milad Asgarimehr +2 more
exaly +5 more sources
2013
The GNSS-reflectometry works as a bi-static radar system in which the transmitter and the receiver are separated by a significant distance. This Chapter compiles different theoretical aspects to understand the GNSS signals after their reflection of the Earth surface, including multi-static system, specular and diffuse scattering, delay and doppler ...
Shuanggen Jin +2 more
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The GNSS-reflectometry works as a bi-static radar system in which the transmitter and the receiver are separated by a significant distance. This Chapter compiles different theoretical aspects to understand the GNSS signals after their reflection of the Earth surface, including multi-static system, specular and diffuse scattering, delay and doppler ...
Shuanggen Jin +2 more
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Expanding the Scope of GNSS Reflectometry
2023Another 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 ...
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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&#160;people ...
Joakim Strandberg, Rüdiger Haas
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The rise of GNSS reflectometry for Earth remote sensing
2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015The 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 +6 more
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Theoretical Fundamentals of GNSS Reflectometry
2021GNSS 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.
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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 ...
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