Results 131 to 140 of about 4,973 (237)
Accelerating the CLEAN algorithm of radio interferometry with convex optimization
Astronomy & AstrophysicsContext. In radio interferometry, images are recovered from incompletely sampled Fourier datasets. The de facto standard algorithm, the Cotton–Schwab CLEAN, iteratively switches between computing a deconvolution (minor loop) and subtracting the model ...
Müller Hendrik +2 more
doaj +1 more source
THE COMPACT RADIO STRUCTURE OF RADIO-LOUD NARROW LINE SEYFERT 1 GALAXIES
, 2010 We present the compact radio structure of three radio-loud narrow line Seyfert 1 galaxies from the Very Long Baseline Array archive data at 2.3, 5, and 8.4 GHz. In RXS J16290+4007, the radio structure is mostly unresolved.
Chen, Yongjun +3 more
core +1 more source
NOS/NGS activities to support development of radio interferometric surveying techniques
, 1980 National Geodetic Survey activities towards the development of operational geodetic survey systems based on radio interferometry are reviewed. Information about the field procedures, data reduction and analysis, and the results obtained to date is ...
Robertson, D. S. +4 more
core
Accelerating software radio astronomy FX correlation with GPU and FPGA co-processors
, 2010 Includes abstract.Includes bibliographical references (leaves [117]-121).This thesis attempts to accelerate compute intensive sections of a frequency domain radio astronomy correlator using dedicated co-processors.
Woods, Andrew
core
Probing the Low-radio-frequency Emission in PG Quasars with the uGMRT. II
The Astrophysical Journal Supplement SeriesWe present results from uGMRT 685 MHz observations of 87 QSOs belonging to the Palomar–Green (PG) quasar sample with z
Sanna Gulati +5 more
doaj +1 more source
Virtual Observatories and Access to Radio Interferometry Data
, 2007 Radio interferometry produces visibility data which can be processed flexibly to achieve higher resolution or better surface brightness sensitivity. These results are now within the reach of any astronomer as radio archives appear on-line and pipelines ...
Garrington, S T +15 more
core +1 more source
Aliasing from Galactic Plane Setting in Widefield Radio Interferometry
The Astrophysical JournalMeasurements with widefield radio interferometers often include the near-infinite gradient between the sky and the horizon. This causes aliasing inherent to the measurement itself and is purely a consequence of the Fourier basis.
N. Barry +4 more
doaj +1 more source
The Astrophysical JournalThe Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project has a new very long baseline interferometry (VLBI) Outrigger at the Green Bank Observatory (GBO), which forms a 3300 km baseline with CHIME operating at 400–800 MHz ...
Shion Andrew +18 more
doaj +1 more source
Compressed sensing imaging techniques for radio interferometry
, 2017 Radio interferometry probes astrophysical signals through incomplete and noisy Fourier measurements. The theory of compressed sensing demonstrates that such measurements may actually suffice for accurate reconstruction of sparse or compressible signals ...
Jacques, L. +4 more
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Fundamentals of Radio Interferometry [PDF]
Proceedings of 2nd MCCT-SKADS Training School. Radio Astronomy: fundamentals and the new instruments — PoS(2nd MCCT-SKADS), 2009 openaire +1 more source