Ionospheric F2-Layer critical frequency retrieved from COSMIC radio occultation: A statistical comparison with measurements from a meridional ionosonde chain over Southeast Asia
Sign Up to like & getrecommendations! Published in 2019 at "Advances in Space Research"
DOI: 10.1016/j.asr.2018.09.015
Abstract: Abstract In this paper, we compared the F2-Layer critical frequency (foF2) derived from FORMOSAT-3/COSMIC radio occultation (RO) and ionosondes at Chiang Mai, Chumphon and Kototabang during the years 2008–2015 to evaluate the performance of COSMIC… read more here.
Keywords: chiang mai; radio occultation; critical frequency; ionosonde ... See more keywords
New results in studying foF2 trends
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Atmospheric and Solar-Terrestrial Physics"
DOI: 10.1016/j.jastp.2017.04.002
Abstract: Abstract It is shown that there are three causes of the difference in values of trends in the F2-layer parameters obtained by different groups of authors: using initial data series of different length, the absence… read more here.
Keywords: studying fof2; critical frequency; results studying; new results ... See more keywords
Gravitational effects on Faraday instability in a viscoelastic liquid
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2025.328
Abstract: Abstract The influence of parametric forcing on a viscoelastic fluid layer, in both gravitationally stable and unstable configurations, is investigated via linear stability analysis. When such a layer is vertically oscillated beyond a threshold amplitude,… read more here.
Keywords: critical frequency; faraday instability; instability; parametric forcing ... See more keywords
Multiple bound states for a class of fractional critical Schrödinger–Poisson systems with critical frequency
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Mathematical Physics"
DOI: 10.1063/5.0174872
Abstract: In this paper we study the fractional Schrödinger–Poisson system ε2s(−Δ)su+V(x)u=ϕ|u|2s*−3u+|u|2s*−2u,ε2s(−Δ)sϕ=|u|2s*−1,x∈R3, where s ∈ (0, 1), ɛ > 0 is a small parameter, 2s*=63−2s is the critical Sobolev exponent and V∈L32s(R3) is a nonnegative function which… read more here.
Keywords: critical frequency; schr dinger; dinger poisson;
A Mathematical Model to Simulate Vertical Motors and Calculate Reed Critical Frequency
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Transactions on Industry Applications"
DOI: 10.1109/tia.2024.3408104
Abstract: This paper provides a mathematical model for calculating the reed critical frequency (RCF) of vertical motors on a massive rigid base. Typical methods of predicting RCF of vertical motors are performing a bump test on… read more here.
Keywords: critical frequency; reed critical; model; vertical motors ... See more keywords
Winter Anomaly in the Critical Frequency of the E-Layer in the Nighttime Polar Cap
Sign Up to like & getrecommendations! Published in 2018 at "Geomagnetism and Aeronomy"
DOI: 10.1134/s0016793218010061
Abstract: With the medians of the E-layer critical frequency foE measured at Resolute Bay and Casey ionospheric stations located in the polar caps of the Northern and Southern Hemispheres, it is found that these medians are… read more here.
Keywords: nighttime polar; winter; critical frequency; polar cap ... See more keywords
Revisiting sunspot number as an extreme ultraviolet (EUV) proxy for ionospheric F2 critical frequency
Sign Up to like & getrecommendations! Published in 2025 at "Annales Geophysicae"
DOI: 10.5194/angeo-43-91-2025
Abstract: Abstract. This study reconsiders sunspot number (Sn) as a solar extreme ultraviolet (EUV) proxy for modeling the ionospheric F2 layer's critical frequency (foF2) over the period 1960–2023. We compare the performance of Sn with F10.7… read more here.
Keywords: critical frequency; euv proxy; extreme ultraviolet; ultraviolet euv ... See more keywords