Results 61 to 70 of about 35,861 (225)
Applications of the Irbene Single-Baseline Radio Interferometer
GalaxiesThe Irbene single-baseline radio interferometer (ISBI), operated by the Ventspils International Radio Astronomy Centre (VIRAC), offers a rare and versatile configuration in modern radio astronomy.
Ivar Shmeld +14 more
doaj +1 more source
Interferometry meets the third and fourth dimensions in galaxies
, 2014 Radio astronomy began with one array (Jansky's) and one paraboloid of revolution (Reber's) as collecting areas and has now reached the point where a large number of facilities are arrays of paraboloids, each of which would have looked enormous to Reber ...
Trimble, Virginia
core +1 more source
Hyperspectral tomographic diffractive microscopy: Development and applications
Journal of Microscopy, EarlyView.Abstract Tomographic Diffractive Microscopy (TDM) provides label‐free three‐dimensional imaging of transparent samples with resolution surpassing confocal limits. At IRIMAS, successive instrumental developments since 2009 have enhanced TDM capabilities through transmission, reflection, isotropic, polarisation‐sensitive, and dual‐view configurations ...
Leonardo Pestana Legori +4 more
wiley +1 more source
Atom radio-frequency interferometry
, 2020 We realize and model a Rydberg-state atom interferometer for measurement of phase and intensity of radio-frequency (RF) electromagnetic waves. A phase reference is supplied to the atoms via a modulated laser beam, enabling atomic measurement of the RF wave's phase without an external RF reference wave.
Anderson, David A. +4 more
openaire +2 more sources
Peixe Zircon as a Quality Control Reference Material in U‐Pb Geochronology by LA‐ICP‐MS
Geostandards and Geoanalytical Research, Volume 50, Issue 2, Page 369-389, June 2026.Key Points Peixe#0 zircon was characterised for U‐Pb geochronology using CA‐ID‐TIMS, SIMS and a long‐term LA‐ICP‐MS data set. The consistent results establish Peixe#0 as a reference material for U‐Pb quality control. Trace element heterogeneity requires careful, CL‐guided spot selection.
Margareth Sugano Navarro +7 more
wiley +1 more source
Discovery of a wandering radio jet base after a large X-ray flare in the blazar Markarian 421
, 2015 We investigate the location of the radio jet bases ("radio cores") of blazars in radio images, and their stationarity by means of dense very long baseline interferometry (VLBI) observations.
Doi, A. +5 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract In this study, daytime F‐region irregularities were observed at low latitudes during the main phase of the 12 November 2025 strong magnetic storm, causing intense very high frequency radar echoes ranging hundreds of kilometers in altitude.
Wenjie Sun +10 more
wiley +1 more source
The Astronomical JournalWe have obtained very high angular resolution (a few milliarcseconds or sub-parsec-scale) Very Long Baseline Array (VLBA) and European Very Long Baseline Interferometry Network (EVN) radio continuum images of the nucleus in the barred spiral galaxy NGC ...
Seppo Laine +6 more
doaj +1 more source
Solving the Corner-Turning Problem for Large Interferometers [PDF]
, 2010 The so-called corner turning problem is a major bottleneck for radio telescopes with large numbers of antennas. The problem is essentially that of rapidly transposing a matrix that is too large to store on one single device; in radio interferometry, it ...
Andrew Lutomirski +13 more
core +2 more sources
Radio interferometry by lunar reflections
The Astrophysical Journal, 1990 The use of the moon as a passive reflector for radio interferometry experiments with baselines on the order of the radius of the orbit of the moon is discussed. Because of the extreme loss in the lunar interferometer path, only exceptionally strong point sources are candidates for this kind of interferometry.
T. Hagfors, J. A. Phillips, L. Belkora
openaire +1 more source