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Table 2 List of three coefficients for the second-order fitted curve and coefficients of determination of the second-order fitted curve obtained at six geomagnetic stations

From: Long-term variation in the upper atmosphere as seen in the geomagnetic solar quiet daily variation

Station name

Coefficient c

Coefficient d

Coefficient e

Coefficient of determination

Addis Ababa

−9.205 × 10−4 ± 2.654 × 10−4

7.458 × 10−1 ± 7.693 × 10−2

40.219 ± 4.96

0.848

Guam

−5.699 × 10−4 ± 1.541 × 10−4

4.360 × 10−1 ± 4.428 × 10−1

27.612 ± 2.83

0.840

Kakioka

−3.430 × 10−4 ± 9.720 × 10−5

2.045 × 10−1 ± 2.869 × 10−2

19.763 ± 1.893

0.598

San Juan

−3.056 × 10−4 ± 9.509 × 10−5

1.850 × 10−1 ± 2.807 × 10−2

20.711 ± 1.848

0.580

Chambon-La-Foret

−2.782 × 10−4 ± 1.361 × 10−4

2.018 × 10−1 ± 4.015 × 10−2

22.161 ± 2.634

0.540

Niemegk

−4.647 × 10−4 ± 1.413 × 10−4

2.638 × 10−1 ± 4.168 × 10−2

21.329 ± 2.738

0.544