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Table 1 Global electron content (GEC)-extreme ultraviolet (EUV) increase rate derived from linear GEC-EUV fitting

From: How does ionospheric TEC vary if solar EUV irradiance continuously decreases?

Month

GEC-EUV increase rate

January

0.422

February

0.513

March

0.602

April

0.580

May

0.435

June

0.342

July

0.314

August

0.365

September

0.462

October

0.565

November

0.510

December

0.436