Digital Ionosonde Observations of the Cusp/Cleft region of the Ionosphere
The ionosphere over Cambridge Bay (77o CGM lat.) shows a number of unexpected and interesting features due to its coupling with the magnetosphere. We discuss the behaviour that occurs in 4 time intervals: (a) Noon (10-13 LMT): A relatively quiet interval showing moderate speed poleward flow. (b) Pos...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.7173 http://www.ursi.org/Proceedings/ProcGA02/papers/p0919.pdf |
| Summary: | The ionosphere over Cambridge Bay (77o CGM lat.) shows a number of unexpected and interesting features due to its coupling with the magnetosphere. We discuss the behaviour that occurs in 4 time intervals: (a) Noon (10-13 LMT): A relatively quiet interval showing moderate speed poleward flow. (b) Postnoon (13-19 LMT): A somewhat disturbed interval that often shows switching of convection direction related to movement of the convection reversal. (c) Nighttime (19-01 LMT): Polar cap type quiet antisunward convection. (d) Morning (01-10 LMT): A very disturbed interval that shows auroral features. This is study of the ionospheric behaviour as seen from Cambridge Bay (geog: 69.1oN, 105.1oW, 77o CGM lat.), a ‘cusp ’ location. We compare this behaviour with stations located further poleward. The measuring instrument is a CADI digital ionosonde [1]. In particular this study will focus on the measured ionospheric convection velocities. For the more poleward stations, Eureka (89o CGM lat.) and Resolute Bay (83o CGM lat.) the patterns of convection |
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