Results 21 to 30 of about 348,356 (178)
A novel type of very long baseline astronomical intensity interferometer [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 This article presents a novel type of very long baseline astronomical interferometer that uses the fluctuations, as a function of time, of the intensity measured by a quadratic detector, which is a common type of astronomical detector. The theory on which the technique is based is validated by laboratory experiments.
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Development of a digital astronomical intensity interferometer: laboratory results with thermal light [PDF]
Journal of Modern Optics, 2017 13 pages, 5 figures, Accepted into special issue of the Journal of Modern ...
Nolan Matthews +2 more
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Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT Optical intensity interferometry, developed in the 1950s, is a simple and inexpensive method for achieving angular resolutions on microarcsecond scales. Its low sensitivity has limited intensity interferometric observations to bright stars so far.
Oh, J. +5 more
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Optical coherence tomography with a Fizeau interferometer configuration [PDF]
, 2005 We report the investigation of a Fizeau interferometer-based OCT system. A secondary processing interferometer is necessary in this configuration, to compensate the optical path difference formed in the Fizeau interferometer between the end of the ...
H. D. Ford +7 more
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Phase Feedback Active Stabilisation Of A Multiplexed Fibre Interferometer [PDF]
Current optical technologies for surface measurement such as white light scanning interferometry (WLSI) can produce sub-nanometric resolution areal height information.
Martin, Haydn, Jiang, Xiang
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Stabilized fiber-optic Mach–Zehnder interferometer for carrier-frequency rejection
, 2013 We have demonstrated stabilization of a fiber-optic Mach–Zehnder interferometer, with a centimeter-scale path difference, to the transmission minimum for the carrier wave of a frequency-modulated laser beam.
Freegarde, Tim +4 more
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An active fiber sensor for mirror vibration metrology in astronomical interferometers [PDF]
Astronomische Nachrichten, 2009 AbstractWe present a fiber sensor based on an active integrated component which could be effectively used to measure the longitudinal vibration modes of telescope mirrors in an interferometric array. We demonstrate the possibility to measure vibrations with frequencies up to ⋍100 Hz with a precision better than 10 nm (© 2009 WILEY‐VCH Verlag GmbH &
Minardi, S. +6 more
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Space Weather, Volume 24, Issue 10, October 2026.Abstract This paper investigates the dynamic evolution of a storm‐time “Super‐EPB” event over China on 1 December 2023 (Kp ≤ 7, SYM/H ≥ −130 nT) using multi‐instrument observations. Occurring near sunset as the IMF‐Bz abruptly turned southward, with auroral extension to midlatitudes, the “Super‐EPB” extended to 40°N with an apex height of ∼2,460 km ...
Longchang Sun +11 more
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The Benefits of Using XML Technologies in Astronomical Data Retrieval and Interpretation [PDF]
, 2016 This paper describes a solution found during recent research that could provide improvements in the efficiency, reliability and cost of retrieving stored astronomical data.
Doicu, Adrian +69 more
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Earth and Space Science, Volume 13, Issue 10, October 2026.Abstract This study explores the relative impact of two orbital configurations for Global Navigation Satellite System radio occultation (RO) observations in numerical weather prediction using observing system simulation experiments (OSSE). Three experiments are carried out: a Control experiment with no RO observations and two experiments with 14,000 RO
Nikki C. Privé +6 more
wiley +1 more source