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Long-term <i>hm</i>F2 trends in the Eurasian longitudinal sector from the ground-based ionosonde observations

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Academic year: 2017

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Table 1. Years of solar minimum and maximum used in the analysis Years of solar minimum Years of solar maximum
Fig. 1. Seasonal variation of the hmF2 trends at 6 European ionosonde stations and 4 moments of SLT
Fig. 4. Same as Fig. 3 but for the dependence on geographic longi- longi-tude. Note some longitudinal effect with negative trends at western European stations.
Table 2. Ionosonde stations and calculated annual mean slope K (in 10 −4 units) for the period 1965–1991
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