Fig. 4
Our prediction for the non-thermal electron spectrum at 200 km for the current Earth. For comparison, the dashed lines show the spectra at several altitudes calculated by Singhal & Haider (1984; taken from their Fig. 3 and multiplied by 4πto move the sr−1 from the units). The sudden increase in the flux at low electron energies is due to the thermal electron spectrum becoming dominant.
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