Table 1.
SO/PHI-HRT and SDO/HMI instrument specifications.
| Specification | SO/PHI-HRT | SDO/HMI |
|---|---|---|
| Working wavelength | 6173 Å | 6173 Å |
| Wavelength positions | −140, −70, 0, 70, 140, + or −300 mÅ | −172, −103, −34, 34, 103, 172 mÅ |
| Field of view | 0.28° ×0.28° | 0.57° ×0.57° |
| Aperture diameter | 140 mm | 140 mm |
| Spectral profile width | 106 mÅ | 76 mÅ |
| Detector size | 2048 × 2048 pixels | 4096 × 4096 pixels |
| Plate scale | 0.5″ | 0.5″ |
| Spatial resolution | 203 km (0.28 au)–725 km (1.0 au) | 725 km |
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