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Table 2

Two-layer atmosphere: modification to HSRA.

Optical depth Field strength Zenith angle Velocity
log(τ500) B [G] γ [°] vdop [km s-1]

Upflow case

0.0 to  − 0.5 1000 60  −6.5
 −0.6 to  − 3.0 1500 20 0.0
Downflow case

0.0 to  − 0.5 1000 120 8.5
 −0.6 to  − 3.0 700 60 0.0

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