Results 91 to 100 of about 27,177 (193)
The Structure and Propagation of the Misaligned Jet M87
Galaxies, 2016 Due to its proximity, M87 is a prime target for next-generation high-resolution VLBI at short millimeter wavelengths, by which the jet launching region and the black hole shadow are expected to be resolved and imaged sometime soon.
Kazuhiro Hada
doaj +1 more source
Earth and Space Science, Volume 11, Issue 11, November 2024.Abstract Growing interest in Earth Orientation Parameters (EOP) resulted in various approaches to the EOP prediction algorithms, as well as in the exploitation of distinct input data, including the observed EOP values from various operational data centers and modeled effective angular momentum functions.
Tomasz Kur +50 more
wiley +1 more source
Journal of Geophysical Research: Solid Earth, Volume 129, Issue 10, October 2024.Abstract Glacial isostatic adjustment (GIA) describes the response of the solid Earth, oceans, and gravitational field to the spatio‐temporal evolution of ice sheets during a glacial cycle. Present‐day vertical displacements and sea‐level changes vary throughout eastern North America in response to the melting of the Laurentide Ice Sheet following the ...
Karen Williams +3 more
wiley +1 more source
VLBI Constraints on Type I b/c Supernovae
, 2013 VLBI observations of supernovae and gamma-ray bursts provide almost the only way of obtaining spatially resolved information about the sources. In particular, a determination of the expansion velocity of the forward shock, as well as the geometry of the ...
Bietenholz, Michael F.
core +1 more source
Climatic signals observed by VLBI
Acta Geodaetica et Geophysica Hungarica, 2006 VLBI observations at various stations all over the globe have been carried out since the beginning of the eighties. As VLBI allows to determine tropospheric parameters such as hydrostatic and wet zenith path delays stable and long time series of these parameters exist that can be used for climatological studies.
Schuh, H. +3 more
openaire +4 more sources
Single-band VLBI Absolute Astrometry
The Astronomical Journal, 2023 Abstract The ionospheric path delay impacts single-band, very long baseline interferometry (VLBI) group delays, which limits their applicability for absolute astrometry. I consider two important cases: when observations are made simultaneously in two bands, but delays in only one band are available for a subset of observations; and when ...
openaire +3 more sources
Space Radio Astronomy in the next 1000001 (binary) years
, 2012 Radio astronomy and active exploration of space are peers: both began by efforts of enthusiasts in the 1930s and got a major technological boost in the 1940s-50s.
Gurvits, L. I.
core +1 more source
Use of the VLBI delay observable for orbit determination of Earth-orbiting VLBI satellites [PDF]
Very long-baseline interferometry (VLBI) observations using a radio telescope in Earth orbit were performed first in the 1980s. Two spacecraft dedicated to VLBI are scheduled for launch in 1995; the primary scientific goals of these missions will be ...
Ulvestad, J. S.
core +1 more source
Analysis strategies and software for geodetic VLBI
, 2004 This article describes currently used analysis strategy and data analysis software for geodetic VLBI.Today's geodetic observing strategies are shortly presented, and the geodetic VLBI observables and data modeling are briefly discussed.
Haas, R.
core +1 more source
A Fast Radio Burst Search Method for VLBI Observation
, 2018 We introduce the cross spectrum based FRB (Fast Radio Burst) search method for VLBI observation. This method optimizes the fringe fitting scheme in geodetic VLBI data post processing, which fully utilizes the cross spectrum fringe phase information and ...
Liu, Lei +4 more
core +1 more source