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Software and Techniques for VLBI Data Processing and Analysis
Universe, 2022 Very-long-baseline interferometry (VLBI) is a challenging observational technique, which requires in-depth knowledge about radio telescope instrumentation, interferometry, and the handling of noisy data.
Michael Janssen +2 more
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Pixelization and dynamic range in radio interferometry [PDF]
Astronomy & Astrophysics, 2008 This study investigates some of the consequences of representing the sky by a rectangular grid of pixels on the dynamic range of images derived from radio interferometric measurements. In particular, the effects of image pixelization coupled to the CLEAN deconvolution representation of the sky as a set of discrete delta functions can limit the dynamic ...
Cotton, W. D., Uson, Juan M.
openaire +2 more sources
The Astrophysical Journal, 2023 Scintillation of pulsar radio signals caused by the interstellar medium can in principle be used for interstellar interferometry. Changes in the dynamic spectra as a function of pulsar longitude were in the past interpreted as having spatially resolved ...
M. V. Popov +8 more
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Baseline-dependent averaging in radio interferometry [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 12 pages, 9 figures, accepted for publication in the Monthly Notices of the Royal Astronomical Society ...
S J Wijnholds, A G Willis, S Salvini
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Residual Entropy as a Diagnostic and Stopping Metric for CLEAN
The Astronomical Journal, 2023 We propose the use of entropy, measured from the spatial and flux distribution of pixels in the residual image, as a potential diagnostic and stopping metric for the CLEAN algorithm.
D. C. Homan, J. S. Roth, A. B. Pushkarev
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Bayesian source discrimination in radio interferometry [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Methods currently in use for locating and characterising sources in radio interferometry maps are designed for processing images, and require interferometric maps to be preprocessed so as to resemble conventional images. We demonstrate a Bayesian code - BaSC - that takes into account the interferometric visibility data despite working with more ...
P R Hague, H Ye, B Nikolic, S F Gull
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ANALYSIS OF DUAL-FREQUENCY INTERFEROMETRY APPLICABILITY FOR TARGET ELEVATION ANGLE MEASUREMENT USING TWO-COORDINATE RADARS [PDF]
Radio Physics and Radio Astronomy, 2023 Subject and Purpose. The study deals with the dual-frequency radio interferometry technique, which is based on the employment of two fairly close frequencies with the aim to remove ambiguity of the radar target elevation estimation using 2D-radar and ...
V. G. Galushko +2 more
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On the RFI Detection in Differential Interferometric Synthetic Aperture Radar [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information SciencesSynthetic Aperture Radar (SAR) can image the ground with a wide area and high resolution at all times and in all weather and has become an important means of remote sensing.
Y. Liu, M. Tao, J. Li, T. Li, J. Chen
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The Potsdam Open Source Radio Interferometry Tool (PORT) [PDF]
Publications of the Astronomical Society of the Pacific, 2021 Abstract The Potsdam Open Source Radio Interferometry Tool (PORT) is the very long baseline interferometry (VLBI) analysis software developed and maintained at the GFZ German Research Centre for Geosciences. Chiefly, PORT is tasked with the timely processing of VLBI sessions and post-processing activities supporting the generation of ...
Schuh, H. +20 more
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Testing of the transionospheric radiochannel using data from the global GPS network
Annals of Geophysics, 2003 Using the international ground-based network of two-frequency receivers of the GPS navigation system provides a means of carrying out a global, continuous and fully-computerized monitoring of phase fluctuations of signals from satellite-borne ...
V. A. Karachenschev, E. L. Afraimovich
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