Results 171 to 180 of about 27,177 (193)

Enhanced real-time global ionospheric maps using machine learning. [PDF]

GPS Solut
Iten M, Mao S, Pan Y, Soja B.
europepmc   +1 more source

Black hole jets on the scale of the Cosmic Web

Oei MS, Hardcastle MJ, Timmerman R, Gast AR, Botteon A, Rodriguez AC, Stern D, Rivera GC, Weeren RJv, Röttgering HJ, Intema HT, de Gasperin F, Djorgovski S.   +12 more
europepmc   +1 more source

The multiwavelength behaviour of BL Lacertae explained by a wiggling filamentary jet

Raiteri C.
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

VLBI in transition

SPIE Proceedings, 2006
European VLBI is undergoing a rapid development. On one hand electronic or e-VLBI is changing the very nature of the European VLBI Network (EVN), on the other hand a dramatically increased time resolution will enable the EVN to image vast areas of sky at unprecedented resolution.
Arpad Szomoru, Huib Jan van Langevelde, Harro Verkouter, Mark Kettenis, Bauke Kramer, Friso Olnon, James Anderson, Cormac Reynolds, Zsolt Paragi, Mike Garrett   +9 more
openaire   +1 more source

VLBI clock synchronization

Proceedings of the IEEE, 1977
Atomic clocks at widely separated sites can be synchronized to within several nanoseconds from a few minutes of very-long-baseline interferometry (VLBI) observations, and to within one nanosecond from several hours of such observations.
C.C. Counselman, I.I. Shapiro, A.E.E. Rogers, H.F. Hinteregger, C.A. Knight, A.R. Whitney, T.A. Clark   +6 more
openaire   +1 more source

Future directions of space VLBI: International VLBI Satellite (IVS)

Advances in Space Research, 1991
Abstract Future space VLBI missions will explore new dimensions in angular resolution, sensitivity, frequency range and image quality. The International VLBI Satellite (IVS), currently under assessment by ESA and the Soviet Academy of Sciences, proposes to make significant advances in all these parameters compared with the first generation missions ...
openaire   +1 more source

Long wavelength VLBI

Proceedings of the IEEE, 1973
The application of very-long baseline interferometry (VLBI) techniques at meter and decameter wavelengths has proven to be a unique tool for studying a number of different phenomena. Because of the high angular resolution which we achieve with VLBI, candidate objects for study include the compact nuclei and "jets" associated with quasars and radio ...
T.A. Clark, W.C. Erickson
openaire   +1 more source

European VLBI Network

2023
The European VLBI Network (EVN) is a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa and Puerto Rico, which performs very high angular resolution observations of cosmic radio sources. This report comprises information on the EVN science, operations, observatory reports, activities, meetings ...
openaire   +1 more source

Orbit determination of geosynchronous satellites by VLBI and differential VLBI

Astrodynamics Conference, 1982
Four approaches to radio interferometric tracking of geosynchronous satellites are analyzed and compared. Quasar-based differential very-long-baseline interferometry, which requires a very sensitive receiver, can achieve meter-level position accuracy with a two-baseline system.
T. YUNCK, S. WU
openaire   +1 more source

Low frequency VLBI

AIP Conference Proceedings, 1988
There are many important astrophysical questions which could be answered with observations at frequencies of a few MHz and angular resolution of an arcminute or better. For example, strong interstellar and interplanetary scattering of electromagnetic radiation could be studied along many lines of sight, and the sizes and shapes of scattering disks ...
openaire   +1 more source