Table 1.
Instrument characteristics of SO/PHI-FDT and SDO/HMI.
| SO/PHI-FDT | SDO/HMI | |
|---|---|---|
| Filtergraph type | Fabry–Pérot | Lyot/ |
| Michelson | ||
| Working wavelength [nm] | 617.3 | 617.3 |
| Field of view [°] | ⌀ 2 | ⌀ 0.57 |
| Aperture diameter [mm] | 17.5 | 140 |
| Used detector size [pixels] | 20482 | 40962 |
| Plate scale [″/pixel] | 3.75 | 0.5 |
| Wavelength sampling [pm] | 7 | 6.9 |
| Transmission bandwidth [pm] | 10.6 | 6.8 |
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