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
• ?
Polar patches
1996 March 3
Polar patches
Polar cap auroras
Polar cap auroras
Polar cap auroras
Polar cap auroras
Poleward Moving Auroral Forms
Shiokawa et al., JGR 1997
Poleward Moving Auroral Forms
Poleward Moving Auroral Forms
Poleward Moving Auroral Forms
Poleward Moving Auroral Forms
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
More Polar Patches
By < 0 By > 0
More Polar Patches
Eureka
More Polar Patches
More Polar Patches
