[PDF] Top 20 A global model of the ionospheric F2 peak height based on EOF analysis
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A global model of the ionospheric F2 peak height based on EOF analysis
... The ionospheric F2 peak height hmF2 is an impor- tant parameter that is much needed in ionospheric research and practical ...a global model of hmF2. The hmF2 data, used to ... See full document
10
A new global model for the ionospheric F2 peak height for radio wave propagation
... The F2-layer peak density height hmF2 is one of the most important ionospheric parameters characterizing HF propagation ...to model and predict the spatial and temporal variations of ... See full document
13
ANGEO - Semiannual and annual variations in the height of the ionospheric F2-peak
... Fourier analysis of hmF2 data from several ionosonde stations over three solar cycles, and in ...the global thermospheric models TIME-GCM (Roble et ...in height of ®xed pressure-levels in the ... See full document
15
Variability of the peak height of the ionospheric F2 layer over South Africa
... IRI-2001 model predictions, using both the CCIR and URSI ...the analysis was done based on monthly median values for quiet and magnetically disturbed conditions for the entire sunspot ... See full document
75
Automatic scaling of F2 layer parameters from ionograms based on the empirical orthogonal function (EOF) analysis of ionospheric electron density
... IRI-2001 model corresponding to a local time span of 11:00–14:00 LT, spring and high solar activity dur- ing 1993–2003 at ...the EOF analysis - EOFs converge very quickly, and only a few EOF ... See full document
8
A global ionospheric F2 region peak electron density model using neural networks and extended geophysically relevant inputs
... foF2 model), was trained with data from all the stations in Table 11 (a total of 50 ...NNSA model, data from 7 other stations (see Table 12) were also used to verify the predictive ability of the NNSB ... See full document
237
A climatology study on ionospheric F2 peak over Anyang, Korea
... 2 peak altitude are strongly controlled by neutral winds which were measured by a MU radar simultaneously with F 2 peak densities and ...balance height is changed. They noted very low F 2 peak ... See full document
15
Equatorial F2 layer variations: Comparison between F2 peak parameters at Ouagadougou with the IRI 2007 model
... 2 peak characteristics provided by ionosondes, in particular critical frequency of F 2 layer and F 2 maximum height of electron density seem to be heavily compared with the IRI model compared to ... See full document
14
ANGEO - Analysis of the positive ionospheric response to a moderate geomagnetic storm using a global numerical model
... Finally, nonthermal eects must be taken into ac- count for thermospheric storms, especially during their initial phase. Thermospheric upwelling leads to enriched densities of heavier neutral constituents at higher ... See full document
17
Electron density extrapolation above F2 peak by the linear Vary-Chap model supporting new Global Navigation Satellite Systems-LEO occultation missions
... a height of 820 km, is primarily focusing on neutral atmospheric ...RO ionospheric sounding, but only below impact heights of 500 km, in order to guarantee a full data gathering of the neutral ...is ... See full document
12
A study of the ionogram derived effective scale height around the ionospheric hm F2
... Results indicate that the value of median H m increases with increasing solar flux. H m is highest in summer and lowest in winter during the daytime, while it exhibits a much smaller seasonal variation at night. A common ... See full document
10
An analysis of the scale height at the F2 layer peak over three middle latitude stations in the European sector
... of ionospheric magnitudes, the per- formance of ionospheric models, such as the International Reference Ionosphere, IRI (Bilitza and Reinisch, 2008), need to be ...of ionospheric models need to know ... See full document
11
A local ionospheric model for forecasting the critical frequency of the F2 layer during disturbed geomagnetic and ionospheric conditions
... retrospective ionospheric mod- eling over a given ...this model applied in con- nection with a short-term forecasting model for M3000F2 could be used for the forecasting of the MUF for a few hours ... See full document
12
Modeling ionospheric fo F2 by using empirical orthogonal function analysis
... towards ionospheric foF2 can be well indicated by choosing appropriate prox- ...of EOF model are ...of ionospheric foF2 while the coefficients represent the long-term alteration ten- ...order ... See full document
15
Quiet-condition variations in the scale height at F2-layer peak at Jicamarca during solar minimum and maximum
... 4 Summary In this study, we analyze for the first time, the diurnal and seasonal variations of the scale height (Hm) at F2-layer peak near the dip equator during the solar minimum and maxi- mum. The ... See full document
10
Relationships between electron density, height and sub-peak ionospheric thickness in the night equatorial ionosphere
... night-time peak in electron density as seen at a number of ionosonde reflection points extending from New Guinea and Indonesia into northern Australia was examined in terms of the characteristic rise and fall in ... See full document
11
Model results for the ionospheric lower transition height over mid-latitude
... Figure 1. Altitude profiles of ion composition obtained from Atmosphere Explorer-C. Fig. 1. Altitude profiles of ion composition obtained from Atmo- sphere Explorer-C. The aim of this study is to investigate the diurnal, ... See full document
9
Updating the ionospheric propagation factor, M(3000)F2, global model using the neural network technique and relevant geophysical input parameters
... This st udy utili s ed the ANN technique to update and improve on the existing neural network- ba se d global empirical model for the M(3000)F2 ionospheric parameter, [r] ... See full document
92
Neural-network-based prediction techniques for single station modeling and regional mapping of the fo F2 and M(3000)F2 ionospheric characteristics
... although model 2 per- forms very well in most of the cases, it is generally less accu- ...this model is rather an electronic mapping model than a single station model, and consequently such a ... See full document
10
Long-term comparison of the ionospheric F2 layer electron density peak derived from ionosonde data and Formosat-3/COSMIC occultations
... the global evaluation of NmF2 and hmF2 by exploitation of the long-term availability of F-3/C occultation measurements for a period of more than half a solar ...and global accuracy assessment of the ... See full document
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