Results 11 to 20 of about 9,456 (253)
Comparison of Geophysical Model Functions for SAR Wind Speed Retrieval in Japanese Coastal Waters
Remote Sensing, 2013 This work discusses the accuracies of geophysical model functions (GMFs) for retrieval of sea surface wind speed from satellite-borne Synthetic Aperture Radar (SAR) images in Japanese coastal waters characterized by short fetches and variable atmospheric
Merete Badger +4 more
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Development of the CYGNSS Geophysical Model Function for Wind Speed
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2019 Geophysical model functions (GMFs) are developed which map the Level 1 observables made by the Cyclone Global Navigation Satellite System (CYGNSS) radar receivers to ocean surface wind speed. The observables are: 1) the normalized bistatic radar cross section ( σo ) of the ocean surface; and 2) the slope of the leading edge of the radar return pulse ...
Christopher S. Ruf +1 more
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The CMOD7 Geophysical Model Function for ASCAT and ERS Wind Retrievals
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2017 A new geophysical model function (GMF), called CMOD7, has been developed for intercalibrated ERS (ESCAT) and ASCAT C-band scatterometers. It is valid for their combined incidence angle range and being used to generate wind climate data records. CMOD7 has been developed in several steps as a successor of CMOD5.n.
Ad Stoffelen +3 more
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Toward the Generation of a Wind Geophysical Model Function for Spaceborne GNSS-R [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 2019 This paper presents a comprehensive procedure to improve the wind geophysical model function (GMF) for the Global Navigation Satellite System Reflectometry (GNSS-R) instrument onboard the TechDemoSat-1 satellite. The observable used to define the GMF is extracted from the measured delay-Doppler maps (DDMs) by correcting for the nongeophysical effects ...
Wenming Lin +5 more
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An improved C‐band scatterometer ocean geophysical model function: CMOD5 [PDF]
Journal of Geophysical Research: Oceans, 2007 In this paper CMOD5, a new C‐band geophysical model function (GMF), is derived on the basis of measurements from the scatterometer on board of the European Remote Sensing Satellite ERS‐2. First‐guess winds from the European Centre for Medium‐Range Weather Forecasts were used as a reference for the period from August to December 1998, adding up to more ...
H. Hersbach, A. Stoffelen, S. de Haan
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Fast imaging for the 3D density structures by machine learning approach
Frontiers in Earth Science, 2023 Residual Bouguer gravity anomaly inversion can be used to imaging for local density structures or to interpret near-surface anomalous mass distribution. The reasonable prior information is the crucial recipe for obtaining a realistic geological inversion
Yongbo Li +8 more
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Remote Sensing, 2022 Physical understanding and modeling of Ka-band ocean surface backscatter is challenging due to a lack of measurements. In the framework of the NASA Earth Ventures Suborbital-3 Submesoscale Ocean Dynamics Experiment (S-MODE) mission, a Ka-Band Ocean ...
Federica Polverari +8 more
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IEEE Access, 2020 The sea surface temperature (SST) actively impacts the backscattering coefficient measured by scatterometers and the wind retrieval accuracy. However, none of the geophysical model functions (GMFs) currently used in operational wind retrieval considers ...
Yihuan Peng +4 more
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Earth and Space Science, 2021 The rotating fan‐beam architecture wind scatterometer Chinese‐French Oceanography Satellite (CSCAT) onboard the Chinese‐French Oceanography Satellite leads to varying geometries and varying wind retrieval performance across the swath. To assess this, the
Zhen Li +3 more
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Remote Sensing, 2017 This study analyzed the noise equivalent sigma zero (NESZ) and ocean wind sensitivity for Chinese C-band Gaofen-3 (GF-3) quad-polarization synthetic aperture radar (SAR) measurements to facilitate further operational wind extraction from GF-3 data.
Lin Ren +6 more
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