Results 31 to 40 of about 139,585 (296)

Modulation of sporadic E layers by small-scale atmospheric waves in Earth’s high-latitude ionosphere

Solar-Terrestrial Physics, 2019
We have used radio occultation measurements of the satellite CHAMP (Challenging Minisatellite Payload) to examine sporadic E layers (altitudes 90–130 km) in Earth’s high-latitude ionosphere.
Gubenko V.N., Kirillovich I.A.
doaj   +1 more source

Artificial Periodic Irregularities and Investigations of Sporadic E-Layers

2019 URSI Asia-Pacific Radio Science Conference (AP-RASC), 2019
© 2019 URSI. All rights reserved. Artificial periodic irregularities (API) formed in the antinodes of the high-power standing radio wave in the Earth’s ionosphere are proven to be a powerful tool for studying E-region sporadic ionization (Es). We present some applications of the API technique for experimental studies of the Es-layer formations and ...
Bakhmetieva N.V., Yusupov K.M.
openaire   +4 more sources

Fast-type sporadic Na and K layers over São José dos campos, Brazil, and their link to meteor ablation

Frontiers in Astronomy and Space Sciences
This study utilizes 3 years of observational data from the China-Brazil Joint Laboratory for Space Weather (CBJLSW) dual-beam Na-K LIDAR to investigate fast-type sporadic sodium (Na) and potassium (K) layers.
Vania F. Andrioli, Vania F. Andrioli, Vania F. Andrioli, Jiyao Xu, Paulo P. Batista, Laysa C. A. Resende, Laysa C. A. Resende, Laysa C. A. Resende, Angela M. Santos, Angela M. Santos, Angela M. Santos, Femi Olajide-Owoyomi, Alexandre A. Pimenta, Maria P. P. Martins, Ligia A. Da Silva, Ligia A. Da Silva, Ligia A. Da Silva, Juliano Moro, Juliano Moro, Juliano Moro, Rodolfo de Jesus, Guotao Yang, Guotao Yang, Chi Wang, Zhengkuan Liu, Zhengkuan Liu   +25 more
doaj   +1 more source

Interferometry Observations of the Gravity Wave Effect on the Sporadic E Layer

Atmosphere, 2023
On the basis of interferometry measurement made with the Chung-Li VHF radar, we investigated the effects of upward propagating gravity waves on the spatial structures and dynamic behavior of the 3 m field-aligned irregularities (FAIs) of the sporadic E ...
Chane Moges Seid, Ching-Lun Su, Chien-Ya Wang, Yen-Hsyang Chu   +3 more
doaj   +1 more source

Peculiar enhancement in the neutral K and Na layers observed during atypical E-region event in the South American magnetic anomaly (SAMA) region

Frontiers in Astronomy and Space Sciences
The sudden enhancement in the mesospheric neutral metal layers (Ns) has been studied in different latitudes for decades. Specifically, at 23°S, Sodium Ns layers have been analyzed since their first observation at the end of the seventies. Several studies
Vania F. Andrioli, Vania F. Andrioli, Vania F. Andrioli, Jiyao Xu, Jiyao Xu, Paulo P. Batista, Laysa C. A. Resende, Laysa C. A. Resende, Laysa C. A. Resende, Ligia A. Da Silva, Ligia A. Da Silva, Ligia A. Da Silva, Alexandre A. Pimenta, Maria P. P. Martins, Angela M. Santos, Angela M. Santos, Angela M. Santos, Juliano Moro, Juliano Moro, Juliano Moro, Luis Vieira, Sony S. Chen, Guotao Yang, Guotao Yang, Chi Wang, Zhengkuan Liu, Zhengkuan Liu   +26 more
doaj   +1 more source

A case study of a sporadic sodium layer observed by the ALOMAR Weber Na lidar [PDF]

Annales Geophysicae, 2008
Several possible mechanisms for the production of sporadic sodium layers have been discussed in the literature, but none of them seem to explain all the accumulated observations.
H. Nesse, H. Nesse, D. Heinrich, B. Williams, U.-P. Hoppe, J. Stadsnes, M. Rietveld, W. Singer, U. Blum, U. Blum, M. I. Sandanger, E. Trondsen   +11 more
doaj   +1 more source

A statistical study on the correlation between sporadic Ca+ layer and Es in Beijing (40.5°N, 116°E)

Earth and Planetary Physics
From April 2020 to June 2022, a Ca+ lidar with dual-wavelength and narrow-band emitting lasers utilizing all-solid-state technology was employed to conduct observations in Beijing (40.41°N, 116.01°E) for a total duration of 1797.79 hours over 280 nights.
YuChang Xun, ZhiShan Chen, LiFang Du, HaoRan Zheng, Jing Jiao, ZeLong Wang, ShaoHua Gong, GuoTao Yang   +7 more
doaj   +1 more source

Characterization of Coded Random Access with Compressive Sensing based Multi-User Detection [PDF]

, 2014
The emergence of Machine-to-Machine (M2M) communication requires new Medium Access Control (MAC) schemes and physical (PHY) layer concepts to support a massive number of access requests.
Bockelmann, Carsten, Dekorsy, Armin, Ji, Yalei, Popovski, Petar, Stefanovic, Cedomir   +4 more
core   +2 more sources

Difference in the Sporadic E Layer Occurrence Ratio Between the Southern and Northern Low Magnetic Latitude Regions as Observed by COSMIC Radio Occultation Data

Space Weather, 2021
In this study, the difference in the sporadic E layer occurrence ratio between two low‐magnetic‐latitude (±5° to ±15°) regions is analyzed by using COSMIC scintillation observations covering the period from 2007.001 to 2017.365.
J. Niu
doaj   +1 more source

IMPACT OF METEOROLOGICAL STORMS ON THE E-REGION OF THE IONOSPHERE IN 2017–2018

Solar-Terrestrial Physics, 2020
The paper presents the results of observations of the sporadic Es layer during the period of meteorological disturbances in Kaliningrad in October 2017 and 2018 under quiet geomagnetic conditions. During the meteorological storms (October 29–30, 2017 and
O.P. Borchevkina, I.V. Karpov, M.I. Karpov, N.A. Korenkova, V.I. Vlasov, V.S. Leshchenko   +5 more
doaj   +1 more source