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High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering, University of Western Ontario London, Canada. High latitude ionospheric structures:-. Polar Patches Polar cap auroras Poleward Moving Auroral Forms Sporadic-E Spread-F Troughs ?.

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High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

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  1. High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering, University of Western Ontario London, Canada

  2. High latitude ionospheric structures:- • Polar Patches • Polar cap auroras • Poleward Moving Auroral Forms • Sporadic-E • Spread-F • Troughs • ?

  3. Polar patches 1996 March 3

  4. Polar patches

  5. Polar cap auroras

  6. Polar cap auroras

  7. Polar cap auroras

  8. Polar cap auroras

  9. Poleward Moving Auroral Forms Shiokawa et al., JGR 1997

  10. Poleward Moving Auroral Forms

  11. Poleward Moving Auroral Forms

  12. Poleward Moving Auroral Forms

  13. Poleward Moving Auroral Forms

  14. Conclusions • There are many different high latitude structures • Most can easily be identified by their appearance on fixed frequency recordings • It is not obvious that we have identified all the different types of structures

  15. More Polar Patches

  16. More Polar Patches Eureka

  17. More Polar Patches

  18. More Polar Patches

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