Sphero-Conical Modeling for the Estimation of Very Long Baseline Interferometry Invariant Point [PDF]
Sensors, 2022 A geodetic reference frame is a fundamental element in geoinformation fields such as autonomous navigation and digital twins. The international terrestrial reference frame is established and maintained using several space-geodetic techniques, including ...
Tae-Suk Bae, Chang-Ki Hong
doaj +2 more sources
First Very Long Baseline Interferometry Detections at 870 μm [PDF]
The Astronomical JournalThe first very long baseline interferometry (VLBI) detections at 870 μ m wavelength (345 GHz frequency) are reported, achieving the highest diffraction-limited angular resolution yet obtained from the surface of the Earth and the highest-frequency ...
Alexander W. Raymond +278 more
doaj +2 more sources
Measuring Black Hole Light Echoes with Very Long Baseline Interferometry [PDF]
The Astrophysical Journal LettersLight passing near a black hole can follow multiple paths from an emission source to an observer due to strong gravitational lensing. Photons following different paths take different amounts of time to reach the observer, which produces an echo signature
George N. Wong +3 more
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Lorentz symmetry and Very Long Baseline Interferometry [PDF]
, 2016 Lorentz symmetry violations can be described by an effective field theory framework that contains both General Relativity and the Standard Model of particle physics called the Standard-Model extension (SME). Recently, post-fit analysis of Gravity Probe B
Hees, A. +2 more
core +4 more sources
The SFXC software correlator for Very Long Baseline Interferometry: Algorithms and Implementation [PDF]
Experimental astronomy (Print), 2015 In this paper a description is given of the SFXC software correlator, developed and maintained at the Joint Institute for VLBI in Europe (JIVE). The software is designed to run on generic Linux-based computing clusters.
Calvés, G. Molera +15 more
core +4 more sources
Prospects of Detecting a Jet in Sagittarius A* with Very-long-baseline Interferometry [PDF]
The Astrophysical JournalEvent Horizon Telescope (EHT) images of the horizon-scale emission around the Galactic center supermassive black hole Sagittarius A* (Sgr A*) favor accretion flow models with a jet component. However, this jet has not been conclusively detected.
Erandi Chavez +5 more
doaj +2 more sources
The third realization of the International Celestial Reference Frame by very long baseline interferometry [PDF]
Astronomy & Astrophysics, 2020 A new realization of the International Celestial Reference Frame (ICRF) is presented based on the work achieved by a working group of the International Astronomical Union (IAU) mandated for this purpose.
P. Charlot +66 more
semanticscholar +1 more source
Inverse Multiview. I. Multicalibrator Inverse Phase Referencing for Microarcsecond Very Long Baseline Interferometry Astrometry [PDF]
Astrophysical Journal, 2022 Very Long Baseline Interferometry (VLBI) astrometry is a well established technique for achieving ±10 μas parallax accuracies at frequencies well above 10 GHz.
L. Hyland +7 more
semanticscholar +1 more source
Flares and their echoes can help distinguish photon rings from black holes with space-Earth very long baseline interferometry [PDF]
Physical Review D, 2022 Photon rings near the edge of a black hole shadow is supposed to be a unique tool to validate general relativity and provide reliable measurements of principal black hole parameters: spin and mass.
A. Andrianov +5 more
semanticscholar +1 more source
Observable quality assessment of broadband very long baseline interferometry system [PDF]
Journal of Geodesy, 2021 The next-generation, broadband geodetic very long baseline interferometry system, named VGOS, is developing its global network, and VGOS networks with a small size of 3–7 stations have already made broadband observations from 2017 to 2019.
Minghui Xu +5 more
semanticscholar +1 more source