Results 61 to 70 of about 2,679 (211)

Global distribution of ionospheric scintillations from the Real-Time GPS ROTI [PDF]

, 2018
A global real-time monitoring system has been implemented in the frame of ESA-ESTEC/EGNOS-POfunded project MONITOR. It is based on world-wide GNSS datastreams distributed by means of NTRIP and provides multiple ionospheric indices and products to the ...
García Rigo, Alberto, Hernández Pajares, Manuel, Roma-Dollase, David   +2 more
core  

The 74MHz System on the Very Large Array

, 2007
The Naval Research Laboratory and the National Radio Astronomy Observatory completed implementation of a low frequency capability on the VLA at 73.8 MHz in 1998.
A. S. Cohen, B. Hicks, Baars J. W. M., Braude S. Ya., Brentjens M. A., Cornwell T. J., D. Katz, Duim R. M., E. W. Greisen, Erickson W. C., Falcke H., H. R. Schmitt, Jacobson A. R., Jagers W. J., Jagers W. J., Jones L. R., Kassim N. E., Kronberg P. P., Kuhr H., Leahy J. P., Leahy J. P., Leahy J. P., McCready L. L., N. E. Kassim, Napier P. J., Pawsey J. L., Pedlar A., R. A. Perley, Rees N., Roger R. S., Ryle M., Ryle M., Ryle M., Shkolvsky I. S., Slee O. B., Slee O. B., Slee O. B., Subramanian K. R., Swarup G., T. Joseph W. Lazio, Taylor G. B., Thomasson P., W. C. Erickson, W. D. Cotton, Yates K. W.   +44 more
core   +1 more source

State of the Early Career Profession in Space Physics and Aeronomy: Climatological Survey Results

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The American Geophysical Union (AGU) Space Physics & Aeronomy (SPA) section comprises scientists who study the Sun, solar wind, and planetary magnetospheres, ionospheres, and thermospheric/mesospheric systems along with their interconnections.
R. C. Allen, B. Gallardo‐Lacourt, S. Raptis, C. R. Gilly, L. C. Gasque, B. L. Alterman, J. C. Buitrago‐Casas, E. P. Macho, G. Malhotra, R. M. McGranaghan, P. Mostafavi, S. K. Vines   +11 more
wiley   +1 more source

Statistical Analysis of the Occurrence of Ionospheric Scintillations at the Low-Latitude Sanya Station During 2004–2021

Remote Sensing
The ionosphere of the Earth often becomes turbulent and develops electron density irregularities that can cause rapid and random changes in the amplitude and phase of radio signals, which is known as ionospheric scintillation.
Bo Xiong, Changhao Yu, Xiaolin Li, Yuxiao Li, Lianhuan Hu, Yuqing Wang, Lingxiao Du, Yuxin Wang   +7 more
doaj   +1 more source

Characterizing the Role of Storm‐Time High‐Latitude Ionospheric Structures in GPS Position Accuracy in Antarctica: May 2024 Storm

Space Weather, Volume 24, Issue 4, April 2026.
Abstract This study investigates the impact of high‐latitude ionospheric irregularities on global positioning system (GPS) position accuracy during the 10–11 May 2024 geomagnetic storm. Using data from ground‐based GPS receivers and an all‐sky camera in Antarctica, we examined evolution of GPS vertical total electron content, phase fluctuations, and ...
Waqar Younas, Yukitoshi Nishimura, Weixuan Liao, Josh L. Semeter, Sebastijan Mrak, Y. Jade Morton, Keith M. Groves, Tetsuo Motoba, Tim Everett   +8 more
wiley   +1 more source

Equatorial plasma bubbles and L-band scintillations in Africa during solar minimum [PDF]

Annales Geophysicae, 2012
We report on the longitudinal, local time and seasonal occurrence of equatorial plasma bubbles (EPBs) and L band (GPS) scintillations over equatorial Africa.
V. V. Paznukhov, C. S. Carrano, P. H. Doherty, K. M. Groves, K. M. Groves, R. G. Caton, C. E. Valladares, G. K. Seemala, C. T. Bridgwood, J. Adeniyi, L. L. N. Amaeshi, B. Damtie, F. D'Ujanga Mutonyi, J. O. H. Ndeda, P. Baki, O. K. Obrou, B. Okere, G. M. Tsidu   +17 more
doaj   +1 more source

Thousand‐Kilometer‐Scale Wavelike Undulations in Ionospheric Plasma Bubble Lifetime and Development Over Wide Longitudes

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract The irregularities of ionospheric plasma bubbles (EPBs) sequentially generated over wide longitudes are expected to share similar lifetime under normal conditions. In this study, we report a special case where the EPB irregularity lifetime over wide longitudes showed a quasi‐wavelike undulation pattern with wavelength of ∼3,000 km, that is ...
Wenjie Sun, Yuichi Otsuka, Guozhu Li, Prayitno Abadi, Zequan Wang, Guofeng Dai, Lianhuan Hu, Biqiang Zhao, Jianfei Liu, Haiyong Xie, Xiukuan Zhao, Yi Li, Baiqi Ning, Atsuki Shinbori, Michi Nishioka, Septi Perwitasari   +15 more
wiley   +1 more source

PECULIARITIES IN THE IONOSPHERIC SCINTILLATION SPECTRAL INDEX BEHAVIOR BY OBSERVATIONS OF THE COSMIC RADIO SOURCES AT THE DECAMETER WAVELENGTHS

Radio Physics and Radio Astronomy, 2019
Purpose: With relation to radio astronomy, ionospheric scintillation of discrete cosmic radio sources is an undesirable effect. At the same time, ionospheric scintillations carry information on the ionospheric turbulence and are a separate object of ...
S. K. Panishko, O. A. Lytvynenko
doaj   +1 more source

Extrapolation of Airborne Polarimetric and Interferometric SAR Data for Validation of Bio-Geo-Retrieval Algorithms for Future Spaceborne SAR Missions [PDF]

, 2009
Spaceborne SAR system concepts and mission design is often based on algorithms developed and the experience gathered from airborne SAR experiments and associated dedicated campaigns. However, airborne SAR systems have better performance parameters than
Floury, Nicolas, Lee, Seung-Kuk, Papathanassiou, Konstantinos, Scheiber, Rolf   +3 more
core  

Magnetic Shear Damped Polar Convective Fluid Instabilities

, 2017
The influence of the magnetic field shear is studied on the $E\times B$ (and/or Gravitational) and the Current Convective Instabilities (CCI) occuring in the High latitude F-layer ionosphere.
Atul, Jyoti K, Chattopadhyaya, Prabal K, Kaw, Predhiman K, Kravchenko, Oleg V, Sarkar, Sanjib, Singh, Rameswar, Singh, Sushil K   +6 more
core   +1 more source