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Xenon isotopes reveal a geomagnetic prelude to Earth's oxygenation. [PDF]
Natl Sci RevWei Y.
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Development of Geophysical Model Functions for Oceansat-2 Scatterometer
IEEE Geoscience and Remote Sensing Letters, 2013This letter deals with the development of geophysical model functions (GMFs) specific to Oceansat-2 Scatterometer (OSCAT) for the operational retrieval of global ocean surface vector winds from OSCAT. It makes use of OSCAT-measured radar backscatter and the surface analysis winds at 10-m neutral-stability height from the European Centre for Medium ...
Bhawani Singh Gohil +2 more
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Reanalysis of the Tilt MTFs Based on the C-Band Empirical Geophysical Model Function
IEEE Geoscience and Remote Sensing Letters, 2021The tilt modulation is one of the key factors affecting sea wave inversion accuracy based on some microwave sensors such as SAR, microwave spectrometer, and so on. Up to now, the traditional tilt modulation-transfer functions (MTFs) based on the Bragg scattering model and Phillips spectrum have been used in the sea wave spectrum retrieval algorithm for
Yanmin Zhang +3 more
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IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium, 2008
Geophysical model function is the basis for the wind vector retrieval with scatterometer and a number of models have been developed to operationally retrieve the ocean surface wind in the past three decades. However, none of the operational models ever took the water surface temperature into account in its modeling, which is considered to have some ...
Xuetong Xie +5 more
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Geophysical model function is the basis for the wind vector retrieval with scatterometer and a number of models have been developed to operationally retrieve the ocean surface wind in the past three decades. However, none of the operational models ever took the water surface temperature into account in its modeling, which is considered to have some ...
Xuetong Xie +5 more
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Examination of Geophysical Model Functions for Microwave Backscattering from Sea Surfaces
2019 IEEE Conference on Antenna Measurements & Applications (CAMA), 2019This paper presents the examination of geophysical model functions for radar backscattering from sea surfaces. The LGMF (L-band geophysical model function), CMOD5 (C-band model 5), XMOD2 (X-band model 2), and Ku-SASS2 (Ku-band model based on the SeaSat-A satellite scatterometer) models corresponding to L-, C-, X-, and Ku-bands, are examined for their ...
Yisok Oh, Taekyeong Jin, Sinmyong Park
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IEEE Transactions on Geoscience and Remote Sensing, 2008
A unified approach to simulate both microwave radiometric and scatterometric observations over a sea surface based on the two-scale electromagnetic scattering model has been implemented. The simulations have been compared with empirically derived geophysical model functions (GMFs) for the purpose of tuning the electromagnetic forward model and the ...
PIERDICCA, Nazzareno, PULVIRENTI, Luca
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A unified approach to simulate both microwave radiometric and scatterometric observations over a sea surface based on the two-scale electromagnetic scattering model has been implemented. The simulations have been compared with empirically derived geophysical model functions (GMFs) for the purpose of tuning the electromagnetic forward model and the ...
PIERDICCA, Nazzareno, PULVIRENTI, Luca
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Modeling Of Geophysical Signals Based On The Secondorder Local Interpolication Splay-Function
2019 International Conference on Information Science and Communications Technologies (ICISCT), 2019This article is devoted to modeling geophysical signals based on secondary interpolation spline function. The use of second-order local interpolation spline functions for the construction of mathematical models for digital processing and recovery of various geophysical signals is relevant today.
Zayniddinov Xakimjon +1 more
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Geophysical Model Function for Wind Speed Retrieval from SARAL/AltiKa
Marine Geodesy, 2015With the launch of SARAL/AltiKa altimeter, efforts have been made to develop wind speed retrieval algorithms. Here we present two algorithms for estimating and validating wind speed from AltiKa. The first method is based on a theoretical Geophysical Model Function (GMF) using forward model simulations for Ka band specifications. The second is the model
R. M. Gairola +2 more
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Error estimates for a histogram in scatterometer geophysical model function estimation
IEEE Transactions on Geoscience and Remote Sensing, 2002The relationship between the normalized radar cross section /spl sigma//spl deg/ and the ocean surface wind field, i.e., the geophysical model function, is a key element in scatterometry. Due to many unsolved physical modeling problems, only a semi-empirical approach can be used to quantitatively relate the observed /spl sigma//spl deg/ to the wind ...
MIGLIACCIO, Maurizio, P. COLANDREA
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