Results 71 to 80 of about 195,954 (260)

Validation of the Exoplanet Kepler-21b using PAVO/CHARA Long-Baseline Interferometry [PDF]

, 2012
We present long-baseline interferometry of the Kepler exoplanet host star HD179070 (Kepler-21) using the PAVO beam combiner at the CHARA Array. The visibility data are consistent with a single star and exclude stellar companions at separations ~1-1000 ...
Antoine Mérand, Baines, Baraffe, Batalha, Bessell, Borucki, Bryson, Christopher D. Farrington, Claret, Cochran, Cutri, Daniel Huber, Derekas, ESA, Fabrycky, Ford, Fressin, Gail H. Schaefer, Hanbury Brown, Harold A. McAlister, Howell, Howell, Ireland, Judit Sturmann, Kervella, Koch, Laszlo Sturmann, Latham, Michael J. Ireland, Monnier, Morton, Nils H. Turner, P. J. Goldfinger, Peter G. Tuthill, Ricker, Schmidt-Kaler, Shrutskie, Skilling, Steffen, Steve B. Howell, ten Brummelaar, ten Brummelaar, ten Brummelaar, Theo A. ten Brummelaar, Timothy R. Bedding, Timothy R. White, Torres, van Belle, van Belle, van Leeuwen, Vicente Maestro, von Braun   +51 more
core   +2 more sources

Clarification on Generalized Lau condition for X-ray interferometers based on dual phase gratings [PDF]

, 2019
To implement dual phase grating x-ray interferometry with x-ray tubes, one needs to incorporate an absorbing source grating. In order to attain good fringe visibility, the period of a source grating should be subject to a stringent condition. In literature some authors claim that the Lau-condition in Talbot-Lau interferometry can be literally ...
arxiv   +1 more source

Introduction to Interferometry [PDF]

, 1997
This tutorial gives a general introduction to optical and infrared interferometry, specifically addressing two questions: `Can I use VLTI to observe my favourite object?' and `What will it tell me?' The observables measured by an interferometer are fringe visibility and closure phase, which can then be fitted by a model or used to reconstruct an image.
openaire   +3 more sources

Bandwidth in bolometric interferometry [PDF]

Astronomy and Astrophysics, 2010
Bolometric Interferometry is a technology currently under development that will be first dedicated to the detection of B-mode polarization fluctuations in the Cosmic Microwave Background. A bolometric interferometer will have to take advantage of the wide spectral detection band of its bolometers in order to be competitive with imaging experiments.
Charlassier, R., Bunn, E. F., Hamilton, J.-C., Kaplan, J., Malu, S.   +4 more
openaire   +6 more sources

CREATING THE RT-32 RADIO TELESCOPE ON THE BASIC OF MARK-4B ANTENNA SYSTEM. 1. MODERNIZATION PROJECT AND FIRST RESULTS

Radio Physics and Radio Astronomy, 2019
Purpose: Creating a radio telescope based on the MARK-4B antenna system being developed for telecommunication applications, determining the possibilities of using the broadband multirange operation of a beam wave-guided antenna system and to evaluate ...
O. M. Ulyanov, O. M. Reznichenko, V. V. Zakharenko, A. V. Antyufeyev, A. M. Korolev, O. M. Patoka, V. I. Prisiazhnii, A. V. Poichalo, V. V. Voityuk, V. N. Mamarev, V. V. Ozhinskii, V. P. Vlasenko, V. M. Chmil, V. I. Lebed, M. I. Palamar, A. V. Chaikovskii, Yu. V. Pasternak, M. A. Strembitskii, M. P. Natarov, S. O. Steshenko, V. V. Glamazdyn, A. S. Shubny, A. A. Kirilenko, D. Y. Kulik, A. A. Konovalenko, L. M. Lytvynenko, Ya. S. Yatskiv   +26 more
doaj   +1 more source

Stückelberg-Interferometry with ultra-cold atoms [PDF]

, 2010
We show that and how ultra-cold atoms in an accelerated two-band lattice are a controlled realization of Landau--Zener--St\"uckelberg interferometry.
arxiv   +1 more source

Atmospheric Phase Compensation in Extreme Weather Conditions for Ground-Based SAR

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Herein, a semiempirical model is proposed to remove the atmospheric phase screen (APS) that occurs during ground-based synthetic aperture radar (GB-SAR) monitoring in steep mountainous areas with extreme weather conditions.
Amila Karunathilake, Motoyuki Sato
doaj   +1 more source

Progress in Interferometry for LISA at JPL

, 2011
Recent advances at JPL in experimentation and design for LISA interferometry include the demonstration of Time Delay Interferometry using electronically separated end stations, a new arm-locking design with improved gain and stability, and progress in ...
Andrew Sutton, Bender P, Brent Ware, Brian Bachman, Daniel Shaddock, David Robison, Glenn de Vine, Jeffrey Dickson, Kirk McKenzie, LISA Frequency control study team, Mitryk S J, Robert Spero, Shaddock D Ware B Halverson P G Spero R E Klipstein B Merkowitz S M Livas J C, Tetsuo Ozawa, Tinto M, William Klipstein   +15 more
core   +1 more source

Comparison of Molecular Iodine Spectral Properties at 514.7 and 532 nm Wavelengths

Measurement Science Review, 2014
We present results of investigation and comparison of spectral properties of molecular iodine transitions in the spectral region of 514.7 nm that are suitable for laser frequency stabilization and metrology of length.
Hrabina J., Acef O., Burck F. du, Chiodo N., Candela Y., Sarbort M., Hola M., Lazar J.   +7 more
doaj   +1 more source

A Polarimetric First-Order Model of Soil Moisture Effects on the DInSAR Coherence

Remote Sensing, 2015
Changes in soil moisture between two radar acquisitions can impact the observed coherence in differential interferometry: both coherence magnitude |Υ| and phase Φ are affected. The influence on the latter potentially biases the estimation of deformations.
Simon Zwieback, Scott Hensley, Irena Hajnsek   +2 more
doaj   +1 more source