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Earth, Planets and Space
Fig. 7. | Earth, Planets and Space

Fig. 7.

From: A new global empirical model of the electron temperature with the inclusion of the solar activity variations for IRI

Fig. 7.

(a) Daytime electron temperature from our data base (mean plus standard deviation) versus solar activity for different seasons (columns) and different altitudes (1st row: 550 ± 50 km, 2nd row: 850 ± 90 km; 3rd row: 2000 ± 300 km). Also include is a least-square fitted quadratic (at 2000 km linear) approximation to the data (black curve), new Te model (blue solid), the IRI Te model (IK option) (blue dashed), the FLIP model (red), and the ISR averages from the Millstone Hill model (green). The green line at 2000 km (lowest row of panels) shows the temperature averages from Akebono/TED (see Bilitza et al., 2007). The orange line at 550 and 850 km (upper two rows of panels) represents the neutral temperature as given by the MSIS-86 model. The total number of data points Np is given in the lower right of each panel. (b) Same as Fig. 7(a) but for nighttime instead of daytime electron temperature.

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