Results 31 to 40 of about 47,664 (300)

Snow Depth Inversion in Forest Areas from Sentinel-1 Data Based on Phase Deviation Correction

open access: yesRemote Sensing, 2022
At present, snow depth inversion based on active microwave remote sensing is concerned essentially with areas having a relatively simple underlying surface.
Yu Li, Xinyue Zhao, Quanhua Zhao
doaj   +1 more source

Comparison of Persistent Scatterer Interferometry and SAR Tomography Using Sentinel-1 in Urban Environment

open access: yesRemote Sensing, 2018
In this paper, persistent scatterer interferometry and Synthetic Aperture Radar (SAR) tomography have been applied to Sentinel-1 data for urban monitoring.
Alessandra Budillon   +5 more
doaj   +1 more source

Simultaneous Water Vapor and Dry Air Optical Path Length Measurements and Compensation with the Large Binocular Telescope Interferometer [PDF]

open access: yes, 2016
The Large Binocular Telescope Interferometer uses a near-infrared camera to measure the optical path length variations between the two AO-corrected apertures and provide high-angular resolution observations for all its science channels (1.5-13 $\mu$m ...
Böhm, M.   +16 more
core   +4 more sources

Gas dynamics in the inner few AU around the Herbig B[e] star MWC297: Indications of a disk wind from kinematic modeling and velocity-resolved interferometric imaging [PDF]

open access: yes, 2017
We present near-infrared AMBER (R = 12, 000) and CRIRES (R = 100, 000) observations of the Herbig B[e] star MWC297 in the hydrogen Br-gamma-line. Using the VLTI unit telescopes, we obtained a uv-coverage suitable for aperture synthesis imaging.
Harries, Tim   +6 more
core   +2 more sources

基于InSAR数据分析四川盆地南部长宁页岩气区块地表形变场基本特征

open access: yesDizhen xuebao, 2022
近年来随着我国页岩气大规模开采,四川盆地南部活动构造相对稳定的地区出现了一系列微震和有感地震,甚至是破坏性地震。这些地震是否为工业开采所诱发,目前已有研究从时空相关性给出了一些统计推断,本文则从形变观测角度分析页岩气开采能否产生可以检测到的地面形变,以揭示形变信息与页岩气开采的关系,尝试为页岩气开采提供有效的监测手段。基于长波ALOS-2卫星雷达数据对长宁页岩气区块近两三年内的InSAR地表形变展开探测,检测页岩气大规模生产可能造成的地面形变及其基本特征,同时使用Sentinel ...
Yuxin Bao   +7 more
doaj   +1 more source

Real-time optical differentiation for moire interferometry [PDF]

open access: yesApplied Optics, 1987
Real-time methods for differentiation of in-plane displacement fields produced by the moire interferometry technique are introduced. Two approaches are developed: (1) optical shearing of displacement patterns and (2) superposition of two lateral shear interferograms of wavefronts from 2 diffraction orders of the specimen grating. Coherence problems are
Patorski, K.   +3 more
openaire   +3 more sources

Atom interferometry gravity-gradiometer for the determination of the Newtonian gravitational constant G [PDF]

open access: yes, 2006
We developed a gravity-gradiometer based on atom interferometry for the determination of the Newtonian gravitational constant \textit{G}. The apparatus, combining a Rb fountain, Raman interferometry and a juggling scheme for fast launch of two atomic ...
Bertoldi, A.   +9 more
core   +2 more sources

To the question on accuracy of forest heights’ measurements by the TanDEM-X radar interferometry data [PDF]

open access: yesСибирский лесной журнал, 2016
The paper presents the validation results of the InSAR method for determining the forest canopy height, based on TanDEM-X and ALOS PALSAR data. The research conducted on the territory of the Baikal-Kudara forest area of the Republic of Buryatia (52°10'N,
T. N. Chimitdorzhiev   +5 more
doaj   +1 more source

FLEA: Fresnel-limited extraction algorithm applied to spectral phase interferometry for direct field reconstruction (SPIDER) [PDF]

open access: yes, 2013
We present a novel extraction algorithm for spectral phase interferometry for direct field reconstruction (SPIDER) for the so-called X-SPIDER configuration.
Alessia Pasquazi   +33 more
core   +2 more sources

Evaluating the Preconditions of Two Remote Sensing SWE Retrieval Algorithms over the US

open access: yesRemote Sensing, 2020
A large amount of fresh water resources are stored in the snowpack, which is the primary source of water for streamflow in many places at middle-to-high latitude areas. Therefore, snow water equivalent (SWE) is a key parameter in the water cycle.
Shadi Oveisgharan   +5 more
doaj   +1 more source

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