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Table 1
Left: Wavelengths and indicative formation heights of the K I, Na D1, Ca I, and He I 1083 chromospheric lines. Right: snapshot of the scaled-down SAMM prototype telescope at various stages of its design and development.
| Line | Wavelength (nm) | Height (km) | Diffraction limit resolution (km) | |
|---|---|---|---|---|
| K I | 770 | 3–400 | 0.71 |  |
| Na D1 | 590 | 6–700 | 0.54 | |
| Ca I | 422 | 1000 | 0.39 | |
| He I | 1083 | 1900 | 1.19 |
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