Results 41 to 50 of about 287,420 (285)

Nonlinear Phase Speeds and Depth Inversions [PDF]

Coastal Dynamics 2005, 2006
Experiments were conducted in a laboratory facility under with a fixed bathymetric profile containing a single bar. A hybrid data set was collected consisting of remotely sensed wave data combined with modelgenerated wave amplitude profiles. The data is used to test the improvements in depth retrieval through the use of a nonlinear composite dispersion
Patricio Catalán, Merrick C. Haller
openaire   +1 more source

Depth model building by constrained magnetotelluric inversion

Annals of Geophysics, 2002
In this paper we describe an approach aimed at integrating seismic and magnetotelluric data in a complex geological setting, characterised by thrust structures, in Southern Apennine, Southern Italy.
S. Morandi, P. Dell'Aversana
doaj   +1 more source

Monitoring Specified Depth Soil Moisture in Field Scale with Ground Penetrating Radar

智慧农业, 2022
Ground-penetrating radar (GPR) is one of the emerging technologies for soil moisture measurement. However, the measurement accuracy is difficult to determine due to some influence factors including radar wave frequency, soil texture type, etc.
ZHANG Wenhan, DU Keming, SUN Yankun, LIU Buchun, SUN Zhongfu, MA Juncheng, ZHENG Feixiang   +6 more
doaj   +1 more source

Coherent X-ray Diffractive Imaging; applications and limitations

, 2003
The inversion of a diffraction pattern offers aberration-free diffraction-limited 3D images without the resolution and depth-of-field limitations of lens-based tomographic systems, the only limitation being radiation damage.
A. Szoke, Beetz, Chapman, Elser, Fienup, H. He, H. N. Chapman, H. Padmore, He, Heel, Hegerl, Henke, J. C. H. Spence, M. R. Howells, McEwen, McGuire, Meyer-Ilse, Miao, Miao, Miao, Neutze, R. A. London, R. Rosen, S. Marchesini, S. P. Hau-Riege, Sayre, Solem, Solem, Spence, Szoke, Szöke, U. Weierstall, Weierstall, Zuo   +33 more
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Forward modelling of sub-photospheric flows for time-distance helioseismology [PDF]

, 2007
Context: The results of forward modelling of acoustic wave propagation in a realistic solar sub-photosphere with two cases of steady horizontal flows are presented and analysed by the means of local helioseismology.
Erdélyi, Robert, Shelyag, Sergiy, Thompson, Michael John   +2 more
core   +2 more sources

Non-inversion conservation tillage as an underestimated driver of tillage erosion

Scientific Reports, 2022
Tillage erosion is a widely underestimated process initiating soil degradation especially in case of large agricultural fields located in rolling topography.
L. K. Öttl, F. Wilken, A. Hupfer, M. Sommer, P. Fiener   +4 more
doaj   +1 more source

X-ray image reconstruction from a diffraction pattern alone

, 2003
A solution to the inversion problem of scattering would offer aberration-free diffraction-limited 3D images without the resolution and depth-of-field limitations of lens-based tomographic systems. Powerful algorithms are increasingly being used to act as
A. Noy, D. Sayre, D. Sayre, H. He, H. He, H. He, H. N. Chapman, I.K. Robinson, J. C. H. Spence, J. Miao, J. Miao, J.C.H. Spence, J.C.H. Spence, J.H. Seldin, J.M. Zuo, J.N. Cederquist, J.R. Fienup, J.R. Fienup, J.R. Fienup, M. R. Howells, R. Gerchberg, R. Neutze, S. Marchesini, S. P. Hau-Riege, U. Weierstall, U. Weierstall, V. Elser, Y. Kamura   +27 more
core   +1 more source

Depth Inversion Using SAR and Super-Resolution Enhancement: A Case Study on Case II Waters

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Depth inversion is crucial for ocean exploration, with synthetic aperture radar (SAR) technology being a key tool due to its all-weather capabilities. However, SAR-based depth inversion typically has limited resolution, ranging from hundreds to thousands
Meng Zhang, Chao Qi, Jianbing Chen, Dianpeng Su, XiaoDong Cui, Fanlin Yang, Ruifu Wang   +6 more
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3D Gravity Inversion on Unstructured Grids

Applied Sciences, 2021
Compared with structured grids, unstructured grids are more flexible to model arbitrarily shaped structures. However, based on unstructured grids, gravity inversion results would be discontinuous and hollow because of cell volume and depth variations. To
Siyuan Sun, Changchun Yin, Xiuhe Gao
doaj   +1 more source

SHALLOW BATHYMETRY ESTIMATION BASED ON LANDSAT 8 REMOTELY SENSED DATAAT BOHAI SEA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Bathymetry is a key variable in ocean monitoring and measurement research. It becomes more and more important for development of rapid method to invert shallow sea water depth.
D. J. Zhang, J. Zhan, C. X. Wang, G. Q. Zhou   +3 more
doaj   +1 more source