Table 1.
The two main instruments currently providing magnetograms in the photosphere.
| Instrument | SDO/HMI | Hinode/SOT/SP |
|---|---|---|
| Method | Images in six wavelengths and four polarization states | Spatial and spectral scan of region |
| Spectral lines | Fe I at 617.33 nm | Fe I doublet at 630.15 nm and 630.25 nm |
| Field of view | Full disk | Active region |
| Spatial resolution | 0.5 arcsec | 0.32 arcsec |
| Time resolution | 12 min | ≈45 min (scan duration) |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.