Results 111 to 120 of about 726 (157)

PRIMA: study for a dual-beam instrument for the VLT Interferometer

SPIE Proceedings, 1998
PRIMA (instrument for Phase-Referenced Imaging and Microarcsecond Astrometry) is a conceptual study for a single-baseline dual-feed instrument for the Very Large Telescope Interferometer (VLTI), which is under construction by the European Southern Observatory on Cerro Paranal in Chile. The goals of PRIMA include narrow-angle astrometry with a precision
Andreas Quirrenbach, Vincent Coude du Foresto, Gerard Daigne, Karl-Heinz Hofmann, Reiner Hofmann, Mario G. Lattanzi, R. Osterbart, Rudolf S. le Poole, Didier Queloz, Farrokh Vakili   +9 more
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The new classic instrument for the navy precision optical interferometer

SPIE Proceedings, 2016
The New Classic instrument was built as a electronics and computer upgrade to the existing Classic beam combiner at the Navy Precision Optical Interferometer (NPOI). The classic beam combiner is able to record 32 of 96 available channels and has a data throughput limitation which results in a low duty cycle.
A. M. Jorgensen, H. R. Schmitt, J. T. Armstrong, E. K. Baines, R. Hindsley, D. Mozurkewich, G. T. van Belle   +6 more
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Digital Array Scanned Interferometer: Instrument and Results

Fourier Transform Spectroscopy New Methods and Applications, 1995
Digital array scanned interferometers or DASIs (also, HFTS, fixed FTS, or SMIFTS), blend characteristics of a grating spectrometer and a two-beam interferometer for acquisition of hyperspectra.
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Instrumentation development and testing for the ALBATROS low-frequency interferometer

2022
The cosmic dark ages was an early period in the universe’s history beginning after recombination and lasting until the birth of the first stars. The 21-cm emission from neutral hydrogen in this era provides a valuable tracer with which to probe the state and evolution of the early universe.
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The VLT Interferometer: a unique instrument for high-resolution astronomy

SPIE Proceedings, 2000
The Very Large Telescope (VLT) Observatory on Cerro Paranal (2635 m) in Northern Chile is approaching completion in this year when the fourth of the 8-m Unit Telescopes will see first light. At the same time, the preparation for first fringes of the VLT Interferometer (VLTI) is advancing rapidly with the goal of having the first fringes with two ...
Andreas Glindemann, Roberto Abuter, Franco Carbognani, Francoise Delplancke, Frederic Derie, Alberto Gennai, Philippe B. Gitton, Pierre Kervella, Bertrand Koehler, Samuel A. Leveque, Serge Menardi, Alain Michel, Francesco Paresce, Than Phan Duc, Andrea Richichi, Markus Schoeller, Massimo Tarenghi, Anders Wallander, Rainer Wilhelm   +18 more
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Far-infrared Interferometer Instrument Simulator (FIInS)

2016
The Far-infrared Interferometer Instrument Simulator, FIInS, is an instrument simulator for a Far-infrared Spectro-Spatial Interferometer. The main goal is to simulate both the input and the output of such a system, and compare the input sky map with the synthesised one after data processing algorithms have been applied.
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Development activities for interferometer-based hyperspectral sounder instrument

SPIE Proceedings, 2009
A development program was conducted to further improve the technology readiness level of the Generic Flight Interferometer (GFI), a candidate technology for the future hyperspectral sounder on MTG. Interferometer-based sounders have already demonstrated their performance and reliability in conducting advanced sounding tasks in recent missions (METOP-
Philippe Giaccari, Frederic J. Grandmont, Jacques G. Giroux, Louis-Phillipe A. Bibeau, James Veilleux, Martin C. Larouche   +5 more
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Next Generation Instrumentation for the Very Large Telescope Interferometer

Astrophysics and Space Science, 2003
The scientific capabilities of the VLT Interferometer can be substantially enhanced through new focal-plane instruments. Many interferometric techniques — astrometry, phase-referenced imaging, nulling, and differential phase measurements — require control of the phase to ≲ 1 rad; this capability will be provided at the VLTI by the PRIMA facility. Phase-
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Laser Interferometer Instrumented in a Disk Antenna for Gravitational Radiation

Japanese Journal of Applied Physics, 1991
Disk antennas combined with a laser interferometer as a displacement transducer can be made into highly sensitive, wideband detectors for gravitational radiation. The proposed detector system, which operates at room temperature, has a minimum detectable amplitude of gravitational radiation, h min=4×10-18, and a detection ...
Kimio Tsubono, Norikatsu Mio Norikatsu Mio, Akihiko Mizutani Akihiko Mizutani   +2 more
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The flight instrument design for the Terrestrial Planet Finder Interferometer

SPIE Proceedings, 2005
This paper describes the opto-mechanical systems of the telescopes and beramcombiner spacecraft including the wavefront and optical path control devices and alignment systems. The mechanical layouts of the spacecraft are described along with the predicted performance of the structure in terms of thermal and vibration control.
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