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Table 2.
Proposed propagators and associated pupils (Hα, A) and (Hβ, A′) for different types of perturbations.
| Perturbations | Hα | A | Hβ | A′ |
|---|---|---|---|---|
| Source covariance | Im G0 | P | Im G0 | P |
| Sound speed |  |
P |  |
P |
| Flow uθ |  |
Qsouth |  |
Qnorth |
| Flow uϕ |  |
Qeast |  |
Qwest |
Notes. The pupil geometries are shown in Fig. 1.
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