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Next Generation GNSS-R Instrument
IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020The science payload on each spacecraft in the CYGNSS constellation is a GNSS-R receiver and antennas designed to receive GPS L1 signals scattered from the Earth surface. The constellation was launched on 15 Dec 2016 and the GNSS-R instruments continue to operate successfully.
Christopher Ruf +9 more
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2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
Since the nadir 1-second altimetry precision was first estimated to be of 56 cm when the PARIS concept was developed back in 1993 (it was assumed the interferometric processing of GPS P-code signals and a 4×4 m×m receiving antenna at 700 km orbital altitude) [1], many detailed analyses and experiments have been conducted leading to far more optimistic ...
Manuel Martín-Neira +10 more
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Since the nadir 1-second altimetry precision was first estimated to be of 56 cm when the PARIS concept was developed back in 1993 (it was assumed the interferometric processing of GPS P-code signals and a 4×4 m×m receiving antenna at 700 km orbital altitude) [1], many detailed analyses and experiments have been conducted leading to far more optimistic ...
Manuel Martín-Neira +10 more
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The Pseudo Monostatic Point for Gnss-R
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019Recently, the use of spaceborne GNSS-R for sea-target detection has been demonstrated using DDMs collected by SGR-ReSI onboard TDS-1. These DDMs are windowed around the forward scattering specular point. At this point, the sea-surface response is strongest and it is well suited for remote sensing of Earth’s oceans.
Benjamin J. Southwell +1 more
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The GNSS-R Cygnss Mission: an Update
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019The CYGNSS constellation was successfully launched on 15 Dec 2016 and has been operating continuously in science data-taking mode since March 2017. Updates will be presented on the mission status, calibration and validation activities for its science data products, and recent scientific applications of the measurements.
Chris Ruf +4 more
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Experimental study for GNSS-R polarimetry
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011GNSS 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 +2 more
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Scattering Models for Gnss-R in Inland Waters
2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021Spaceborne 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
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Delay super resolution for GNSS-R
2009 IEEE International Geoscience and Remote Sensing Symposium, 2009Global 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 +4 more
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Status and perspectives of GNSS-R at ESA
2007 IEEE International Geoscience and Remote Sensing Symposium, 2007This 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
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