2020
DOI: 10.1109/jstars.2020.2970106
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Wind Direction Retrieval Using Spaceborne GNSS-R in Nonspecular Geometry

Abstract: A wind direction retrieval algorithm using spaceborne global navigation satellite system reflectometry (GNSS-R) in nonspecular geometry is presented. This article first focuses on investigating the influence of wind direction on the scattering strength purely in specular geometry and nonspecular geometry. The sensitivity of the scattered GNSS signals in nonspecular geometry to wind direction is demonstrated despite the weaker power level. Therefore, a wind direction retrieval algorithm based on the geophysical… Show more

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Cited by 17 publications
(8 citation statements)
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“…The Global Navigation Satellite System (GNSS) can not only be used for positioning, navigation and timing, but also for sensing geophysical parameters through analyzing GNSS signals scattered from the Earth surface. This innovative remote sensing technology is termed GNSS Reflectometry (GNSS-R), which has been applied to ocean altimetry [5], wind field retrieval [6][7][8], tsunami detection [9,10], soil moisture estimation [11] and oil slick detection [12,13]. GNSS signals scattered from the Earth surface can be collected over different platforms, such as ground-based, aircraft-based and space-based receivers [14,15].…”
Section: Introductionmentioning
confidence: 99%
“…The Global Navigation Satellite System (GNSS) can not only be used for positioning, navigation and timing, but also for sensing geophysical parameters through analyzing GNSS signals scattered from the Earth surface. This innovative remote sensing technology is termed GNSS Reflectometry (GNSS-R), which has been applied to ocean altimetry [5], wind field retrieval [6][7][8], tsunami detection [9,10], soil moisture estimation [11] and oil slick detection [12,13]. GNSS signals scattered from the Earth surface can be collected over different platforms, such as ground-based, aircraft-based and space-based receivers [14,15].…”
Section: Introductionmentioning
confidence: 99%
“…Although it requires a more complicated Jacobian, using a bi-directional slope distribution is possible to obtain wind direction information from the GNSS-R observations, especially at areas away from the specular point [124,125]. It is also more suitable for the data assimilation since the state of NWP models are wind vector components.…”
Section: Improvements On the Forward Modelmentioning
confidence: 99%
“…The GNSS-R technology corrects the flaws in traditional remote sensing technologies and has significant research value. Because the reflected signals differ from the signal directly received from the satellite in terms of delay, Doppler shift, power strength, and polarization, they can be used to characterize the Earth’s surface [ 27 , 28 , 29 , 30 , 31 , 32 ]. These differences are dependent on the scattering surface’s geophysical qualities, and so may contain information about the surface geophysics.…”
Section: Introductionmentioning
confidence: 99%