Results 41 to 50 of about 15,849 (201)
Split-And-Delay Unit for FEL Interferometry in the XUV Spectral Range
Applied Sciences, 2017 In this work we present a reflective split-and-delay unit (SDU) developed for interferometric time-resolved experiments utilizing an (extreme ultraviolet) XUV pump–XUV probe scheme with focused free-electron laser beams.
Sergey Usenko +8 more
doaj +1 more source
On the matrix formulation of time-delay interferometry
, 2021 Time-delay interferometry (TDI) is a processing step essential for the scientific exploitation of LISA, as it reduces the otherwise overwhelming laser noise in the interferometric measurements. The fundamental idea is to define new laser-noise-free observables by combining appropriately time-shifted measurements.
Bayle, Jean-Baptiste +3 more
openaire +2 more sources
The effects of orbital motion on LISA time delay interferometry [PDF]
Classical and Quantum Gravity, 2003 In an effort to eliminate laser phase noise in laser interferometer spaceborne gravitational wave detectors, several combinations of signals have been found that allow the laser noise to be canceled out while gravitational wave signals remain. This process is called time delay interferometry (TDI).
Cornish, Neil J., Hellings, Ronald W.
openaire +3 more sources
Photonics, 2023 The use of statistical estimation theory to boost the metrological performance of the measurement apparatus is becoming increasingly popular in a wide range of applications.
Fabrizio Sgobba +6 more
doaj +1 more source
Time-delay interferometry for LISA with one arm dysfunctional [PDF]
Classical and Quantum Gravity, 2010 In order to attain the requisite sensitivity for LISA - a joint space mission of the ESA and NASA- the laser frequency noise must be suppressed below the secondary noises such as the optical path noise, acceleration noise etc. By combining six appropriately time-delayed data streams containing fractional Doppler shifts - a technique called time delay ...
Dhurandhar, S. V. +2 more
openaire +2 more sources
Applied Sciences, 2018 Heterodyne interferometry based on an optical frequency comb (OFC) is a powerful tool for distance measurement. In this paper, a method to calculate the effective center wavelength of wide spectrum heterodyne interference signal was explored though both ...
Shilin Xiong +5 more
doaj +1 more source
Joint Estimation of Ground Displacement and Atmospheric Model Parameters in Ground-Based Radar
Remote Sensing, 2023 Atmospheric delay is the primary error in ground-based synthetic aperture radar (GBSAR). The existing compensation methods include the external meteorological data correction method, the polynomial fitting method, and the persistent scatterers SAR ...
Yan Zhu +5 more
doaj +1 more source
Coherent shift estimation for stacks of SAR images
, 2011 Speckle tracking is used with SAR images to estimate displacements, in ways that support or integrate interferometric measurements. This paper derives Fisher information expressions for the displacement estimation using coherent speckle tracking, for the
De Zan, Francesco, Francesco De Zan
core +1 more source
Comparison study of algorithms and accuracy in the wavelength scanning interferometry [PDF]
, 2012 Wavelength scanning interferometry (WSI) can be used for surface measurement with discontinuous surface profiles by producing phase shifts without any mechanical scanning process.
Gao, F. +4 more
core +1 more source
The One-Way Linear Effect, a first order optical effect
Heliyon, 2023 In the One-Way Linear Effect, the round-trip time interval T0′ taken by light to propagate around a moving linear closed contour, is measured by a device. If the contour changes velocity by Δv, the round-trip interval T′(X′,Δv) turns out to depend on the
Gianfranco Spavieri, Espen Gaarder Haug
doaj +1 more source