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

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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 ?. - PowerPoint PPT Presentation

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Page 1: 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

Page 2: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,
Page 3: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,
Page 4: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,
Page 5: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

High latitude ionospheric structures:-

• Polar Patches

• Polar cap auroras

• Poleward Moving Auroral Forms

• Sporadic-E

• Spread-F

• Troughs

• ?

Page 6: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Polar patches

1996 March 3

Page 7: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Polar patches

Page 8: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Polar cap auroras

Page 9: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Polar cap auroras

Page 10: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Polar cap auroras

Page 11: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Polar cap auroras

Page 12: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Poleward Moving Auroral Forms

Shiokawa et al., JGR 1997

Page 13: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Poleward Moving Auroral Forms

Page 14: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Poleward Moving Auroral Forms

Page 15: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Poleward Moving Auroral Forms

Page 16: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

Poleward Moving Auroral Forms

Page 17: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

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

Page 18: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

More Polar Patches

By < 0 By > 0

Page 19: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

More Polar Patches

Eureka

Page 20: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

More Polar Patches

Page 21: High Latitude Ionospheric Structures John MacDougall Dept. Electrical and Computer engineering,

More Polar Patches


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