Results 121 to 130 of about 4,973 (237)

Radio Interferometric Research of Ionosphere by Signals of Space Satellites

Open Astronomy, 2013
Since 2012, the Radiophysical Research Institute and the Lobachevsky State University at Nizhny Novgorod, Russia and the Ventspils International Radio Astronomy Centre at Irbene, Latvia are making radio interferometric experiments on study of ionosphere ...
Dugin N., Antipenko A., Bezrukovs V., Gavrilenko V., Dementjev A., Lesins A., Nechaeva M., Shmeld I., Snegirev S., Tikhomirov Yu., Trokss J.   +10 more
doaj   +1 more source

Rock Physics of the Critical Zone: Models, Inversion, and Interpretation

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Rock physics models link geophysical measurements with subsurface petrophysical properties, such as porosity, mineral composition, and fluid saturation. While originally developed for hydrocarbon exploration, these models are increasingly applied in the near surface for quantitative interpretation of geophysical data.
Dario Grana, Brady A. Flinchum, Denys Grombacher, Andrew D. Parsekian, Clifford S. Riebe, W. Steven Holbrook   +5 more
wiley   +1 more source

A very long baseline interferometry sky survey

, 1980
A systematic very long baseline interferometry (VLBI) sky survey, undertaken to find a suitable set of compact celestial radio sources from which a more complete VLBI reference frame can be constructed, discussed.
Morabito, D. D., Preston, R. A.
core  

Optimal arrays for compressed sensing in snapshot-mode radio interferometry

, 2013
Context. Radio interferometry has always faced the problem of incomplete sampling of the Fourier plane. A possible remedy can be found in the promising new theory of compressed sensing (CS), which allows for the accurate recovery of ...
Clara Fannjiang
core   +1 more source

On the Detection of Low‐Frequency Planetary Radio Emission With an Orbiting Interferometer

Radio Science, Volume 61, Issue 6, June 2026.
Abstract The magnetized planets of the outer Solar System produce kilometric radio emissions at very low frequencies (<1 ${< } 1\,$MHz). They reveal the planetary magnetic dynamics and their interaction with the solar wind. Those radio emissions can also serve as a proxy for interplanetary space weather monitoring.
E. Rouillé, B. Cecconi, B. Segret, J. N. Girard, A. Loh   +4 more
wiley   +1 more source

Antenna array characterization via radio interferometry observation of astronomical sources

, 2014
We present an in-situ antenna characterization method and results for a “low-frequency” radio astronomy engineering prototype array, characterized over the 75–300 MHz frequency range.
J. G. Bij de Vaate, E. de Lera Acedo, D. Emrich, P. J. Hall, Sutinjo, Adrian, Bij de Vaate, J, B. Crosse, Emrich, David, R. B. Wayth, N. Hurley-Walker, T. M. Colegate, Colegate, Timothy, N. Razavi-Ghods, A. Williams, Hurley-Walker, Natasha, Williams, Andrew, Juswardy, Budi, S. J. Tingay, Crosse, Brian, Faulkner, Patricia, Tingay, Steven, A. J. Faulkner, S. K. Padhi, B. Juswardy, Hall, Peter, A. T. Sutinjo, Wayth, Randall, Ravavi-Ghods, N., Padhi, Shantanu, de Lera Acedo, E.   +29 more
core   +1 more source

Frequency Standard Contributions to Limitations on the Signal‐to‐Noise Ratio in Very Long Baseline Interferometric Observations

Radio Science, Volume 61, Issue 6, June 2026.
Abstract Since its observation in 2019, the first image of a super‐massive black hole using Very Long Baseline Interferometry (VLBI) with an Earth‐scale baseline has generated much scientific and public interest. Work is now underway to extend the baseline into space to obtain higher image resolution.
E. A. Burt, T. A. Ely, G. C. Bower, T. J. W. Lazio, M. Anderson, S. Hernandez   +5 more
wiley   +1 more source

Geodetic Applications of Radio Interferometry

Eos, Transactions American Geophysical Union, 1983
These proceedings contain the papers presented during Symposium No. 5, Geodetic Applications of Radio Interferometry, of the International Association of Geodesy General Meeting held in Tokyo, May 7–8, 1982. The symposium, organized by the IAG Special Study Group 2.51 on Radio Interferometry, had eight sessions and 3 6 papers.
openaire   +1 more source

Peixe Zircon as a Quality Control Reference Material in U‐Pb Geochronology by LA‐ICP‐MS

Geostandards and Geoanalytical Research, Volume 50, Issue 2, Page 369-389, June 2026.
Key Points Peixe#0 zircon was characterised for U‐Pb geochronology using CA‐ID‐TIMS, SIMS and a long‐term LA‐ICP‐MS data set. The consistent results establish Peixe#0 as a reference material for U‐Pb quality control. Trace element heterogeneity requires careful, CL‐guided spot selection.
Margareth Sugano Navarro, Erica Martini Tonetto, Elson P. Oliveira, Mauricio Ibañez‐Mejia, Cristina Talavera, Neal J. McNaughton, Jacinta Enzweiler, Michael Wiedenbeck   +7 more
wiley   +1 more source

High‐Accuracy Thin‐Film Stress Sensor Exploiting Integrated Digital Image Correlation

Strain, Volume 62, Issue 3, June 2026.
A high‐accuracy Speckle Stress Sensor (SSS) is introduced for real‐time thin‐film stress measurements, combining integrated digital image correlation (IDIC) with dense overlapping spot patterns generated by a simple LED‐perforated plate setup. Unlike conventional multi‐beam optical stress sensors relying on detection of the centers of isolated laser ...
R. F. M. Martens, O. van der Sluis, M. G. D. Geers, J. P. M. Hoefnagels   +3 more
wiley   +1 more source