Results 31 to 40 of about 20,366 (247)

Microarcsecond Radio Imaging using Earth Orbit Synthesis [PDF]

open access: yes, 2001
The observed interstellar scintillation pattern of an intra-day variable radio source is influenced by its source structure. If the velocity of the interstellar medium responsible for the scattering is comparable to the earth's, the vector sum of these ...
Cornwell T. J.   +6 more
core   +7 more sources

Exploitation of SAS interferometric phase statistics for coherent change detection

open access: yesElectronics Letters, 2023
Coherent change detection (CCD) takes advantage of the interferometric processing of synthetic aperture sonar (SAS) images and enables the detection of small scale changes to the scene between image pairs.
Emma Shouldice, Vincent Myers
doaj   +1 more source

InSAR monitoring surface deformation induced by underground mining using Sentinel-1 images [PDF]

open access: yesProceedings of the International Association of Hydrological Sciences, 2020
Land subsidence can be caused by underground mining activities. Interferometric Synthetic Aperture Radar (InSAR) has became an economic, effective and accurate technique for land deformation survey and monitoring.
L. Zhang   +5 more
doaj   +1 more source

Modeling space-time correlations of velocity fluctuations in wind farms [PDF]

open access: yes, 2017
An analytical model for the streamwise velocity space-time correlations in turbulent flows is derived and applied to the special case of velocity fluctuations in large wind farms.
Lukassen, Laura J.   +3 more
core   +3 more sources

Continued Monitoring and Modeling of Xingfeng Solid Waste Landfill Settlement, China, Based on Multiplatform SAR Images

open access: yesRemote Sensing, 2021
Continued settlement monitoring and modeling of landfills are critical for land redevelopment and safety assurance. This paper adopts a MTInSAR technique for time-series monitoring of the Xingfeng landfill (XFL) settlement.
Yanan Du   +6 more
doaj   +1 more source

Scattering of gravitational radiation: second order moments of the wave amplitude [PDF]

open access: yes, 2004
Gravitational radiation that propagates through an inhomogeneous mass distribution is subject to random gravitational lensing, or scattering, causing variations in the wave amplitude and temporal smearing of the signal.
Armstrong   +25 more
core   +3 more sources

Widefield multiphoton and temporally decorrelated multifocal multiphoton microscopy

open access: yesOptics Express, 2000
We demonstrate a widefield multiphoton microscope and a temporally decorrelated, multifocal, multiphoton microscope that is based on a high-efficiency array of cascaded beamsplitters. Because these microscopes use ultrashort pulse excitation over large areas of the sample, they allow efficient use of the high-average power available from modern ...
D, Fittinghoff, P, Wiseman, J, Squier
openaire   +2 more sources

Saliency Detection Using Joint Temporal and Spatial Decorrelation [PDF]

open access: yes, 2013
This article presents a scene-driven (i.e. bottom-up) visual saliency detection technique for videos. The proposed method utilizes non-negative matrix factorization (NMF) to replicate neural responses of primary visual cortex neurons in spatial domain. In temporal domain, principal component analysis (PCA) was applied to imitate the effect of stimulus ...
Heikkilä Janne   +2 more
openaire   +1 more source

A statistical gap-filling method to interpolate global monthly surface ocean carbon dioxide data [PDF]

open access: yes, 2015
We have developed a statistical gap-filling method adapted to the specific coverage and prop-erties of observed fugacity of surface ocean CO2(fCO2). We have used this method to interpolate the Sur-face Ocean CO2Atlas (SOCAT) v2 database on a 2.5832.58 ...
Andrew C. Manning   +77 more
core   +1 more source

High quality InSAR data linked to seasonal change in hydraulic head for an agricultural area in the San Luis Valley, Colorado [PDF]

open access: yes, 2011
In the San Luis Valley (SLV), Colorado legislation passed in 2004 requires that hydraulic head levels in the confined aquifer system stay within the range experienced in the years 1978–2000.
Agram, Piyush Shanker   +5 more
core   +1 more source

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