Daily Sunspot Evaluation
Observation Sheet Friday, 1 April 1983
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)
- 2
- Number of spots (f)
- 11
- Relative number (R)
- 31
- Observer
- OG
- Reading
- all checks consistent
- File
- 19830401.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 10 | -18 | 02E | 128 | 01W | 5 | 34 |
| 2 | ARX – 1 | -23 | 07E | 123 | 04E | 35 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.