Very-long-baseline interferometry

Results 131 to 140 of about 33,325 (239)

Implications of very long baseline interferometry measurements on North American intra-plate crustal deformation [PDF]

Very Long Baseline Interferometry experiments over the last 1-3/4 years between Owens Valley, CA and Haystack, MA Radio Observatories suggest an upper limit of east-west crustal deformation between the two sites of about 1 cm/yr. In view of the fact that
Allenby, R. J.
core +1 more source

First Sagittarius A* Event Horizon Telescope Results. VII. Polarization of the Ring

The Astrophysical Journal Letters
The Event Horizon Telescope observed the horizon-scale synchrotron emission region around the Galactic center supermassive black hole, Sagittarius A* (Sgr A*), in 2017. These observations revealed a bright, thick ring morphology with a diameter of 51.8 ±
The Event Horizon Telescope Collaboration +285 more
doaj +1 more source

Multifrequency Very Long Baseline Interferometry Study of Emission and Absorption in the Two-sided Jets of NGC 3998 [PDF]

Xi Yan, Lang Cui, Luis C. Ho
openalex +1 more source

A fast radio burst localized at detection to an edge-on galaxy using very-long-baseline interferometry [PDF]

, 2023
Tomás Cassanelli +50 more
openalex +1 more source

Multifrequency Very Long Baseline Interferometry Imaging of the Subparsec-scale Jet in the Sombrero Galaxy (M104)

The Astrophysical Journal
We report multifrequency and multiepoch very long baseline interferometry studies of the subparsec jet in the Sombrero galaxy (M104, NGC 4594). Using Very Long Baseline Array data at 12, 22, 44, and 88 GHz, we study the kinematics of the jet and the ...
Xi Yan +5 more
doaj +1 more source

The L-/C-band feed design for the DSS 14 70-meter antenna (Phobos mission) [PDF]

A dual-frequency (1.668 and 5.01 GHz) feed was designed for the Deep Space Station (DSS) 14 70-m antenna to support the Soviet Phobos Mission. This antenna system was capable of supporting telemetry, two-way Doppler, and very long baseline interferometry
Reilly, H. F., Jr., Stanton, P. H.
core +1 more source

First Frequency Phase Transfer from the 3 mm to the 1 mm Band on an Earth-sized Baseline

The Astronomical Journal
Frequency phase transfer (FPT) is a technique designed to increase coherence and sensitivity in radio interferometry by making use of the nondispersive nature of the troposphere to calibrate high-frequency data using solutions derived at a lower ...
Sara Issaoun +35 more
doaj +1 more source

High-frequency very long baseline interferometry rotation measure of eight active galactic nuclei [PDF]

, 2013
Juan Carlos Algaba
openalex +1 more source

Viscoelastic deformation near active plate boundaries [PDF]

Very Long Baseline Interferometry (VLBI) now has the capacity to monitor geodetic positions with precisions of a few 1 mm over continental baselines. For tectonic applications, one of the major products of the VLBI program is the determination of the ...
Ward, Steven N.
core +1 more source

Differential Very Long Baseline Interferometry (delta VLBI) spacecraft tracking system demonstration. Part 2: Data acquisition and processing [PDF]

A set of experiments in the use of Differential Very Long Baseline Interferometry (delta VLBI) for spacecraft navigation were completed. Data using both Voyager spacecraft and a single quasar were acquired during the Jupiter encounter time period.
Callahan, P. S. +4 more
core +1 more source

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