Daily Sunspot Evaluation
Observation Sheet Sunday, 28 March 1971
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)
- 5
- Number of spots (f)
- 25
- Relative number (R)
- 75
- Observer
- LT
- Reading
- all checks consistent
- File
- 19710328.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 26 | 33E | 38 | |||
| 2 | D – 19 | -19 | 40E | 31 | |||
| 3 | A – 2 | -14 | 13E | 58 | |||
| 4 | J – 2 | -14 | 04E | 67 | |||
| 5 | J – 1 | -8 | 55W | 126 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.