Results 211 to 220 of about 56,169 (259)

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

Nature Astronomy, 2023
Fast radio bursts (FRBs) are millisecond-duration radio transients whose origins remain unknown. As the vast majority of bursts are one-off events, it is necessary to pinpoint FRBs precisely within their host galaxies at the time of detection.
T. Cassanelli, C. Leung, Pranav Sanghavi, J. Mena-Parra, S. Cary, R. Mckinven, M. Bhardwaj, K. Masui, D. Michilli, K. Bandura, S. Chatterjee, Jeffrey B. Peterson, J. Kaczmarek, C. Patel, Mubdi Rahman, K. Shin, K. Vanderlinde, S. Berger, C. Brar, P. J. Boyle, D. Breitman, P. Chawla, A. Curtin, M. Dobbs, F. Dong, E. Fonseca, B. Gaensler, A. Ibik, V. Kaspi, Khairy Kholoud, A. Lanman, M. Lazda, Hsiu-Hsien Lin, Jing Luo, B. W. Meyers, N. Milutinovic, C. Ng, G. Noble, A. Pearlman, U. Pen, E. Petroff, Z. Pleunis, B. Quine, M. Rafiei-Ravandi, A. Renard, K. R. Sand, E. Schoen, P. Scholz, Kendrick M. Smith, I. Stairs, S. Tendulkar   +50 more
semanticscholar   +1 more source

Very Long Baseline Interferometry

Encyclopedia of Solid Earth Geophysics, 2019
Helmut Wiesemeyer, A. Nothnagel
semanticscholar   +4 more sources

Very long baseline interferometry

Radio Science, 1986
A general review is given of very long baseline interferometry, touching on basic principles and applications, current instrumentation, organization and future developments. Some astronomical high‐lights are discussed.
openaire   +1 more source

Measurement technique. Very long baseline interferometry

Journal of Geodynamics, 1998
Abstract In the last decade there was a large increase in the number of VLBI antennas around the world, both for radioastronomy and geodesy. This increase is connected to the dramatic improvements in their results, in particular for geodesy. In Europe a network of six antennas, spanning from Sweden to Spain and Italy, one of the world's most densely ...
P. Tomasi, T. Clark, J. Campbell
openaire   +1 more source

Very-Long-Baseline Interferometry Applied to Geophysics

Symposium - International Astronomical Union, 1993
Very-long-baseline Interferometry (VLBI) has opened for study a broad new spectrum of geophysical phenomena including: direct observation of the tectonic motions and deformations of the Earth's crustal plates, observations of unprecedented detail of the variations in the rotation of the Earth, and direct measurement of the elastic deformations of the ...
W. E. Carter, D. S. Robertson
openaire   +1 more source

Very Long Baseline Interferometry

1997
The practice of Very Long Baseline Interferometry (VLBI) has undergone a great deal of development since the first demonstrations of the technique in 1967. High quality images including spectroscopy and polarimetry are now routinely produced for a variety of high brightness radio sources.
openaire   +1 more source

Airborne Very Long Baseline Interferometry and Geolocation

Fourth IEEE Workshop on Sensor Array and Multichannel Processing, 2006., 2006
A method is presented of performing geolocation of fixed emitters from a single, airborne platform using a two-element, very long baseline interferometer (VLBI) from 10 to 100 feet in length. The interferometer baseline is precisely tracked through a differential GPS system using auxiliary antennas placed in close proximity to the VLBI pair.
E.C. Carlsen, J.C. Kolanek, D.L. Sharpin
openaire   +1 more source

Very long baseline interferometry

2005
This contribution reviews the technique of Very Long Baseline Interferometry as a tool for high precision measurements of relative point positions and spatial baseline orientation. The geodetic and geophysical applications of these measurements are discussed in relation to the objectives of global and regional programs of Earth dynamics research ...
openaire   +1 more source

Atmospheric Effects in Very Long Baseline Interferometry

Radio Science, 1970
High‐accuracy measurements made by using very long baseline interferometry require corrections for the effects of the atmosphere. A ray‐tracing analysis shows that the phase path through the troposphere differs from the free‐space value by about 3 meters at the zenith. The ionospheric effect predominates at frequencies below 1 GHz.
N. C. Mathur, M. D. Grossi, M. R. Pearlman   +2 more
openaire   +1 more source

Coherence limits for very-long-baseline interferometry

IEEE Transactions on Instrumentation and Measurement, 1981
The quality of the frequency standards used in very-long-baseline interferometry limits the coherent integration time and the accuracy of geodetic experiments except in special cases when clock instabilities can be made to cancel out by using differential interferometry.
Alan E. E. Rogers, James M. Moran
openaire   +1 more source