Daily Sunspot Evaluation
Observation Sheet Friday, 18 March 1988
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 3
- Number of spots (f)
- 50
- Relative number (R)
- 80
- Observer
- HM
- Reading
- all checks consistent
- File
- 19880318.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HSX – 11 | 22 | 02W | 321 | 04W | 3.5 | 47 |
| 2 | DAF – 10 | -30 | 31W | 350 | 33W | 7.5 | 52 |
| 3 | FKF – 29 | -25 | 05E | 314 | 03E | 17 | 48 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.