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Table 4.
Example of entries reserved for parameters extracted from the drawings.
| No. | Parameter description |
|---|---|
| 1 | Latitude of sunspot, degrees |
| 2 | CMD of sunspot, or “longitude” relative to central meridian, negative/positive east/west of central meridian, degrees |
| 3 | Longitude (Carrington longitude of sunspot, degrees |
| 4 | Heliocentric distance, r/R, where r – distance from disc center, R – radius of solar disk |
| 5 | Reserved for: area of sunspot, millionths of solar hemisphere |
| 6 | Reserved for: area of sunspot, pixels |
| 7 | Reserved for: size of sunspot in latitudinal direction, degrees (could be negative as it is computed as difference in latitudes). |
| 8 | Reserved for: size of sunspot in longitudinal direction, degrees |
| 9 | Reserved for: average intensity |
| 10 | Reserved for: contrast of sunspot relative to surrounding photosphere |
| 11 | Reserved for: minimum intensity in sunspot |
| 12 | Reserved for: maximum intensity |
| 13 | Reserved for: tilt angle relative to equator, degrees |
| 14 | Field strength (in units of 100 G) |
| 15 | Reserved for: length of outer boundary of sunspot, pixels |
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