Results 81 to 90 of about 1,980,581 (160)

Investigation of low-latitudeEand valley region irregularities: Their relationship to equatorial plasma bubble bifurcation

, 2011
The low-latitude E, valley and F region 3 m scale irregularities are studied with the Sanya (18.4°N, 109.6°E, dip latitude 12.8°N) VHF coherent scatter radar.
Li, Guozhu, A. K. Patra, Ning, Baiqi, Guozhu Li, Hu, Lianhuan, Patra, A. K., Lianhuan Hu, Weixing Wan, Wan, Weixing, Baiqi Ning   +9 more
core   +1 more source

Study of night time TEC depletion over Indian region [PDF]

, 2020
Observations of night time total electron content depletions recorded over the Indian stations, Udaipur and Bengaluru, are presented. Udaipur is located near the crest of the equatorial ionization anomaly and Bengaluru is the near equatorial station. New
Sharma, Shweta ; Department of Physics, Institute of Science BHU, Varanasi 221005, Rao, S S; Department of Physics, Institute of Science BHU, Varanasi 221005, Pandey, R ; Department of Physics, Institute of Science BHU, Varanasi 221005   +2 more
core  

A Three-Dimensional Simulation of Collisional-Interchange-Instability in the Equatorial-Low-Latitude Ionosphere

, 2005
International audienceWe present a three-dimensional simulation of collisional-interchange-instability in the equatorial-low-latitude F region of ionosphere.
Sobral, Jose H. A., Kherani, Alam E., Mascarenhas, Matheus, Bertoni, Fernando, de Paula, Eurico R., Matheus Mascarenhas, Fernando Bertoni, Alam E. Kherani, Eurico R. De Paula, Jose H. A. Sobral   +9 more
core   +1 more source

Longitudinal Range of the Eastward‐Traveling Equatorial Plasma Bubble Inducing Ionospheric Scintillation

Space Weather
Equatorial Plasma Bubbles (EPBs) can generate ionospheric scintillation at GHz frequencies used in the Global Navigation Satellite System (GNSS). Emerging at any longitude following sunset and typically moving eastward, monitoring the EPBs is essential ...
P. Abadi, Y. Otsuka, S. Saito, M. Yamamoto, S. Perwitasari, I. N. Muafiry, A. Y. Putra, A. Faturahman   +7 more
doaj   +1 more source

Assessment and mitigation of equatorial plasma bubble impacts on category I GBAS operations in the Brazilian region

, 2019
Prior to initiating GBAS service in equatorial regions, it is vital to evaluate potential integrity threats posed by equatorial plasma bubble (EPB)-induced ionospheric gradients and assess availability when implementing ionospheric threat mitigation ...
Pullen, Sam, Lee, Jiyun, Yoon, Moonseok, Kim, Dongwoo   +3 more
core   +1 more source

Signature of white bubbles in the equatorial ionosphere

Earth, Planets and Space
From airglow OI 630 nm observations in the low-latitude ionosphere, we identified an enhancement in the emission rate inside Equatorial Plasma Bubbles (EPBs) on certain occasions after local midnight during equinox seasons.
H. Takahashi, C. A. O. B. Figueiredo, C. M. Wrasse, D. Barros, C. S. Carmo, A. Carrasco, R. A. Buriti, I. Paulino, F. Egito, L. F. R. Vital, G. M. Rosa, A. H. R. Sampaio   +11 more
doaj   +1 more source

Geomagnetic control of equatorial plasma bubble activity modeled by the TIEGCM with Kp

, 2014
Describing the day-to-day variability of Equatorial Plasma Bubble (EPB) occurrence remains a significant challenge. In this study we use the Thermosphere-Ionosphere Electrodynamics General Circulation Model (TIEGCM), driven by solar (F10.7) and ...
Brett Carter (18031558), Kefei Zhang (18044098), J Retterer (20033064), E. Yizengaw (19995990), Robert Norman (9699338), C Bridgwood (20034360), Matthew Francis (11052155), L McNamara (14244908), M Terkildsen (19995987), K Groves (20034354), R Caton (20034357)   +10 more
core  

Plasma bubble phenomenon in the topside ionosphere

, 2007
There are the indications that plasma bubbles/flux tube aligned plasma density depletions, produced by Rayleigh–Taylor instability at the bottomside of ionosphere, could rise up to the topside ionosphere and plasmasphere.
Sidorova, L. N.
core   +1 more source

Equatorial plasma bubble model and integrity risk evaluation for ground based augmentation system in Hong Kong

Satellite Navigation
The spatial gradient induced by the Equatorial Plasma Bubble (EPB) in low latitude regions is a major challenge for the Ground Based Augmentation System (GBAS). To facilitate the implementation and operation of GBAS Approach Service Type (GAST)-D at Hong
Wang Li, Yiping Jiang
doaj   +1 more source

Equatorial plasma bubble model for assessment of GBAS satellite availability

Frontiers in Astronomy and Space Sciences
One of the main concerns for Ground-Based Augmentation Systems (GBAS) is the occurrence of anomalous ionospheric conditions. In particular, ionospheric scintillation poses a significant threat, as strong scintillation events can cause GNSS receivers to ...
Dmytro Vasylyev, Maria Caamano, Babu Sree Harsha Pasumarthi, Martin Kriegel, Susumu Saito   +4 more
doaj   +1 more source