Exact(8)
This elucidates a different sensitivity of Na and Fe to electron concentrations.
The upper panel exhibits electron concentrations that are shown from 21 00 to 30 h LT (06:00 AST).
The differences in lifetime sensitivity to electron concentrations manifest in correlation seen in the Figs. 2 and 6.
A 3D grid containing ion and electron concentrations is generated for every hour of simulated day.
Both the neutral and electron concentrations reveal higher values associated with sporadic-E during the early part of the night, diminishing to lower values later.
As can be seen, between local midnight and 1000 local time the modeled height of the maximum electron concentrations closely followed their experimental behaviour.
Major deviations from Chapman theory (Chapman 1931), which is based on the regular variability of the electron concentrations with solar zenith angles, are named "anomalies".
Sporadic-E is often patchy in nature, i.e., the electron concentrations display spatial variations and hence result in inhomogeneity in the atmosphere (Miller and Smith, 1975).
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