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A new global foF2 model for the International Reference Ionosphere

A new global foF2 model for the International Reference Ionosphere. 1,2 Lee-Anne McKinnell 3 Elijah Oyeyemi. 1 Physics Department, Rhodes University, Grahamstown, South Africa 2 Space Physics Group, Hermanus Magnetic Observatory (HMO), Hermanus, South Africa

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A new global foF2 model for the International Reference Ionosphere

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  1. A new global foF2 model for the International Reference Ionosphere 1,2Lee-Anne McKinnell 3Elijah Oyeyemi 1Physics Department, Rhodes University, Grahamstown, South Africa 2 Space Physics Group, Hermanus Magnetic Observatory (HMO), Hermanus, South Africa 3 Department of Physics, University Of Lagos, Lagos, Nigeria

  2. Global foF2 model • neural network based • 135 ionosonde stations included • predicts foF2 parameter across the globe • mostly data from 1995 – 2005

  3. GLOBAL foF2 MODEL NN Model Day Number Universal Time Zenith Angle Geographic Latitude Magnetic Inclination Magnetic Declination Magnetic Index Solar Index Angle of Meridian Latitude Longitude Year Day Number Hour foF2

  4. Analysis

  5. Low Solar Activity

  6. High Solar Activity

  7. Total

  8. Test Case: Year = 2006

  9. Comparisons with IRI

  10. Equatorial Representation (Training Stations between -10 & +10)

  11. Equatorial prediction comparisons Stations used for analysis

  12. low solar activity NRMSE Values

  13. Sao Luis, -3.6:315.8

  14. Vanimo -2.7, 141.3 Year = 2006

  15. Summary NN Model can predict accurate foF2 values across the globe however

  16. Requirements  magnetic storm time analysis  equatorial sector analysis  high latitude sector analysis  analysis of suitability over the ocean areas  inclusion of more equatorial & high latitude data  reworking of input parameters to tie in with current IRI inputs  re-analyse the relative importance of input parameters

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