نتایج جستجو برای: holographic interferometry
تعداد نتایج: 25489 فیلتر نتایج به سال:
In the paper we provide an overview of a technique for getting repeat pass interferometric surveys by exploiting the very different ASAR modes: Image Mode, Alternating Polarization and Wide-Swath Mode. We briefly discuss the architecture of the modular processor, able to accept any of the cited modes, together with a DEM (if available, if not a global one like GTOPO30 or ENVI is assumed by defa...
Interferometric observations of stars in late stages of stellar evolution and the impact of VLTI observations are discussed. Special attention is paid to the spectral information that can be derived from these observations and on the corresponding astrophysical interpretation of the data by radiative transfer modelling. It is emphasized that for the robust and non-ambiguous construction of dust...
As technology progresses towards smaller electronic packages, thermomechanical considerations pose a challenge to package designers. One area of difficulty is the ability to predict the fatigue life of the solder connections. To do this one must be able to accurately model the thermo-mechanical performance of the electronic package. As the solder ball size decreases, it becomes difficult to det...
This paper describes periodic error in differentialpath interferometry using a Frequency-Path model of the propagation of light from the source to detector in differentialpath interferometers. The model identifies each possible path for each light frequency from the source to detector and predicts the number of interference terms that may be expected at the detector output. The behavior of all ...
Due to its high resolution and the large measuring range, laser interferometer has been applied widely to the precision industrial measurement and calibration. Fabry-Perot interferometry was often used for the microdisplacement, because of its common optical path structure being insensitive to the environmental disturbances. In the past researches, some kinds of modified Fabry-Perot interferome...
The authors demonstrate the generation of multicycle narrow-bandwidth terahertz pulses in periodically inverted GaAs structures using optical rectification of 2 m, 100 fs pump pulses. Three different types of orientation-inverted samples are employed: optically contacted multilayer, orientation-patterned, and diffusion-bonded GaAs. The terahertz pulses are characterized by two-color pump at 2 m...
We present adaptive optics integral field spectrograph observations of the Z CMa binary in the 6203 Å-6528 Å band with a spectral resolution of 3200 and spatial resolution of 0.24′′, made with the OASIS instrument coupled to the PUE’O bonnette. Using the binary parameters derived from speckle interferometry, we are able to recover the spectrum of each component, in spite of a spatial sampling (...
Changes in velocity of the large outlet glaciers and ice streams in Antarctica are important for ice sheet mass balance and hence sea level. The ice flow velocity is also a critical variable in understanding glacier dynamics. Polar Record Glacier, with a calved iceberg in front, is about 50 km to the west of the Zhongshan Station, East Antarctica. SAR interferometry can detect the surface displ...
The forest height is an important forest resource information parameter and usually used in biomass estimation. Forest height extraction with PolInSAR is a hot research field of imaging SAR remote sensing. SAR interferometry is a well-established SAR technique to estimate the vertical location of the effective scattering center in each resolution cell through the phase difference in images acqu...
This work is aimed to present a general method for using the polarimetric information provided by new satellite SAR sensors in order to improve the performance of persistent scatterers interferometry (PSI). PSI methods select for processing only those pixels that are considered as a priori reliable under certain stability criterion. The method proposed in this paper aims to increase the number ...
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