[PDF] Top 20 Modeling ionospheric fo F2 by using empirical orthogonal function analysis
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Modeling ionospheric fo F2 by using empirical orthogonal function analysis
... towards ionospheric foF2 can be well indicated by choosing appropriate prox- ...refilled using similar-parameters ...of ionospheric foF2 while the coefficients represent the long-term alteration ten- ... See full document
15
Automatic scaling of F2 layer parameters from ionograms based on the empirical orthogonal function (EOF) analysis of ionospheric electron density
... the F2 layer, so the C value of pixel points in the calculated traces hc ( f ) near to foF2 is appointed a larger value in ...ionogram F2 trace from large numbers of calculated traces, a correlation anal- ... See full document
8
Reconstructing regional ionospheric electron density: a combined spherical slepian function and empirical orthogonal function approach
... of variations from IGS models is found to be underestimated. Comparing the reconstructed results with real observations of 2 GPS stations within the region indicates an absolute difference is less than 2 TECU, which ... See full document
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LONG TERM TRENDS IN THE IONOSPHERIC fo F2 IN THE INDIAN ZONE LOW LATITUDE IONOSPHERE
... regression analysis, neural network based methods, ...component analysis or empirical orthogonal function analysis technique has been a very powerful tool which is being used in ... See full document
6
Empirical Orthogonal Function Analysis for GRACE Gravity Data
... Gravity Modeling in Spherical Radial Basis Functions - On the Role of the Basis Function and the Combination of Different Observation Types advisors ... See full document
5
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 ...the ionospheric propagation factor M(3000)F2 observed by ... See full document
10
Seismo-ionospheric coupling correlation analysis of earthquakes in Greece, using empirical mode decomposition
... correlation analysis ensures cancelation of the geomagnetic storm ef- fects due to the cross correlation function involved, there are still ionospheric variations present in the two signals caused by ... See full document
8
Statistical characteristics of the total ion density in the topside ionosphere during the period 1996–2004 using empirical orthogonal function (EOF) analysis
... The EOF method is introduced to analyze and model the topside ionosphere’s plasma density N i at middle to equa- torial latitudes. The 9-year DMSP N i data at 09:30 LT and 21:30 LT was, respectively, decomposed into a ... See full document
17
Analysis of surface soil moisture patterns in agricultural landscapes using Empirical Orthogonal Functions
... an Empirical Orthogonal Function (EOF) analysis was applied and the results were correlated with parameters derived from topography, soil, vegetation and land manage- ment to link the patterns ... See full document
14
Application of Empirical Orthogonal Function Models to Analyze Shoreline Change at Bangkalan Madura
... The performance comparison between EOF and One- line model on shoreline change prediction can be evaluated by using the RMSE, expressed by Eq. (3). where, Ym i is the shoreline ordinate of the model in the i th ... See full document
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Multivariate Empirical Orthogonal Function analysis of the upper thermocline structure of the Mediterranean Sea from observations and model simulations
... 7 Summary and conclusions In this paper, we have attempted to provide a representation of the upper thermohaline vertical structure of the Mediter- ranean Sea by means of bivariate vertical EOFs, using tem- ... See full document
21
Modeling of GPS total electron content over the African low latitude region using empirical orthogonal functions
... Statistical analysis From the EOF-based TEC model, we have simulated the TEC for the months of March, June, September and Decem- ber for low (2009) and high (2013) solar activity ... See full document
12
Neural-network-based prediction techniques for single station modeling and regional mapping of the fo F2 and M(3000)F2 ionospheric characteristics
... In ionospheric prediction, single-station ionospheric models posses several advantages over the rest of the methods; their cost is very Correspondence to: ... See full document
10
Ionospheric fo F2 anomalies during some intense geomagnetic storms
... The ionospheric positive storm during magnetic dis- turbances is attributed to the F2 layer uplifting due to vertical drift, plasma fluxes from the plasmasphere, and downwelling of the gas as a result of ... See full document
13
Ionospheric <i>fo</i>F2 anomalies during some intense geomagnetic storms
... The ionospheric positive storm during magnetic dis- turbances is attributed to the F2 layer uplifting due to vertical drift, plasma fluxes from the plasmasphere, and downwelling of the gas as a result of ... See full document
14
A revised approach to the fo F2 long-term trends analysis
... bear F2-layer storm effects (geomagnetic activity effects) which, however, cannot be removed using conven- tional monthly Ap ...the F2-layer storm effects with posi- tive and negative phases ... See full document
13
Long-term trends in fo F2: their estimating and origin
... 2. The solar cycle effect in foF2 is many times larger than the long-term trend in foF2, therefore the results of trend calculations depend on correcting for solar activ- ity, which is made by various ways but always ... See full document
6
One-step ahead prediction of fo F2 using time series forecasting techniques
... Received: 24 February 2005 – Revised: 9 September 2005 – Accepted: 4 October 2005 – Published: 22 November 2005 Part of Special Issue “1st European Space Weather Week (ESWW)” Abstract. In this paper the problem of ... See full document
8
An interpretation of the fo F2 and hm F2 long-term trends in the framework of the geomagnetic control concept
... contemporary F2-layer storm mechanisms. The F2-layer parameter trends strongly depend on the long-term varying geomagnetic ac- tivity whose effects cannot be removed from the trends using ... See full document
16
Long-term trends of fo F2 independent of geomagnetic activity
... To have the same smoothing for both foF2 and solar index data we used a 12-month smoothing of the E81 index. Figs. 1 and 2 demonstrate that it is actually so. Figure 1 shows the relative trends (without getting rid of ... See full document
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