Results 1 to 10 of about 1,806 (190)
The ionosphere and radio interferometry
Annals of Geophysics, 1997 This paper reviews the effects of the ionosphere on radio astronomjcal observations, what we can learn about the ionosphere from radio interferometry, and a procedure to correct for these effects.
T. A. Th. Spoelstra
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MULTI-FREQUENCY RADIO INTERFEROMETRY ALGORITHM
Odessa Astronomical Publications, 2019 This article is a continuation of the work published in (Orlov, 2018). A method of multi-frequency beamforming of a radio interferometer is proposed. The model diagram is presented, which consists of two antenna arrays, filters, receivers and a signal ...
V. V. Orlov +2 more
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Demonstrating the Principles of Aperture Synthesis with Table- Top Laboratory Exercises [PDF]
EPJ Web of Conferences, 2019 Many undergraduate radio astronomy courses are unable to give a detailed treatment of aperture synthesis due to time constraints and limited math backgrounds of students.
Marr J.M. +6 more
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Observations of atmospheric gravity waves by radio interferometry: are results biased by the observational technique? [PDF]
Annales Geophysicae, 1997 In this paper we present a quantitative comparison between a large data base of medium-scale atmospheric gravity waves (AGWs) observed by radio interferometry of transionospheric radio sources and the results of a numerical simulation of the observed ...
C. Mercier, A. R. Jacobson
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Demonstration of Ultrawideband Polarimetry Using VLBI Exploration of Radio Astrometry (VERA)
Galaxies, 2022 We report on recent technical developments in the front- and back-ends for the four 20 m radio telescopes of the Japanese Very-Long-Baseline Interferometry (VLBI) project, VLBI Exploration of Radio Astrometry (VERA). We present a brief overview of a dual-
Yoshiaki Hagiwara +5 more
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Irregular Layout for a Satellite’s Interferometric Array
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 We address the optimization problem of antenna placement on satellite-mounted interferometric synthetic-aperture instruments. In classic designs, the antennas on satellites are aligned regularly on the satellite’s frame.
Paul Krzakala +10 more
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Sensors, 2020 An external modulation laser module assembly (EMLMA) is proposed to suppress nonlinear errors in an interferometry system and improve its measurement performance.
Tao Zhang +4 more
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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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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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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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