Results 91 to 100 of about 3,117 (297)

Ionospheric Scintillations of vhf Radio Signals from Satellites at Ahmedabad [PDF]

, 1978
9-12The Faraday fading records of radio beacons from low orbiting satellites Explorer 22 and 27 recorded at Ahmedabad are analyzed for the occurrence of scintillations.
Iyer, K N, Rastogi, R G
core  

The Geography of Success: A Spatial Analysis of Export Intensity in the Italian Wine Industry

Agribusiness, EarlyView.
ABSTRACT This paper investigates the paradox of how Italy's fragmented, SME‐dominated wine industry achieves global export success. Moving beyond purely firm‐centric explanations, we test whether export intensity is spatially dependent, clustering geographically in regional ecosystems.
Nicolas Depetris Chauvin, Jonas Di Vita
wiley   +1 more source

Space weather challenges of the polar cap ionosphere

Journal of Space Weather and Space Climate, 2013
This paper presents research on polar cap ionosphere space weather phenomena conducted during the European Cooperation in Science and Technology (COST) action ES0803 from 2008 to 2012.
Spogli Luca, Romano Vineenzo, Daabakk Yvonne, Alfonsi Lucilla, Oksavik Kjellmar, Moen Jøran   +5 more
doaj   +1 more source

GPS scintillations and total electron content climatology in the southern low, middle and high latitude regions

Annals of Geophysics, 2013
In recent years, several groups have installed high-frequency sampling receivers in the southern middle and high latitude regions, to monitor ionospheric scintillations and the total electron content (TEC) changes.
Luca Spogli, Lucilla Alfonsi, Pierre J. Cilliers, Emília Correia, Giorgiana De Franceschi, Cathryn N. Mitchell, Vincenzo Romano, Joe Kinrade, Miguel Angel Cabrera   +8 more
doaj   +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

SEASONAL VARIATIONS OF THE IONOSPHERE SCINTILLATIONS PARAMETERS OBTAINED FROM THE LONG OBSERVATIONS OF THE POWER COSMIC RADIO SOURCES AT THE DECAMETER WAVE RANGE

Odessa Astronomical Publications, 2016
Observations of the four power cosmic radio sources were carried out on the radio telescope (RT) URAN-4 during 1987-1990 and 1998-2007 at the frequencies 20 and 25 MHz.
O. A. Lytvynenko, S. K. Panishko
doaj   +1 more source

Radio Scintillations Near the F-region Anomaly Crest [PDF]

, 1987
357-359The amplitude scintillations at Bombay (lat., 19ᵒN; long., 73ᵒE), situated near the Appleton anomaly crest region, are found to be most prominent during equinoxial, less during winter and least during summer months. During the course of the night,
Koparkar, Pramila
core  

Prediction of Ionospheric Scintillation with ConvGRU Networks Using GNSS Ground-Based Data across South America

Remote Sensing
This study investigates the relationship between geomagnetic activities and ionospheric scintillations, focusing on how solar and geomagnetic parameters influence ionospheric disturbances across varying time frames and latitudes.
Alireza Atabati, Iraj Jazireeyan, Mahdi Alizadeh, Richard B. Langley   +3 more
doaj   +1 more source

Evolutionary radiation of large‐bodied gorgonopsians from the lower Abrahamskraal formation of South Africa

The Anatomical Record, EarlyView.
Abstract The middle Permian represents a critical interval in therapsid evolution, when gorgonopsians emerged as some of the first specialized apex predators within terrestrial ecosystems. Despite their significance, the early diversification of Gorgonopsia in Gondwana remains poorly understood due to scarcity and fragmentary material.
Zanildo Macungo, Ricardo Araújo, Bruce S. Rubidge, Michael O. Day, Kathleen N. Dollman, Julien Benoit   +5 more
wiley   +1 more source

How do secondary schools in England talk about modern languages? A corpus‐assisted discourse analysis of school websites

British Educational Research Journal, EarlyView.
Abstract Situating the study within an ecological perspective on language education, this article examines how secondary schools in England present Modern Languages (MLs) on official school websites. Focusing on 44 schools in Local Authorities with the lowest percentage average entry for the Languages pillar of the EBacc, we built a text database ...
Zhu Hua, Yunpeng Du, Elin Arfon
wiley   +1 more source