Results 11 to 20 of about 4,973 (237)
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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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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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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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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Performance evaluation of carrier interferometry implementations of MC-CDMA over a wideband channel suffering phase noise [PDF]
, 2005 In this paper the performance of Carrier Interferometry (CI) and Pseudo-Orthogonal Carrier Interferometry (PO-CI) [1] implementations of Multi-Carrier Code Division Multiple Access (MC-CDMA) are investigated.
Taylor, N +3 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.
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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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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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