| Description of elements in the header | |
|---|---|
| m_ss | amount of monthly sunshine duration |
| m_sx | the maximum sunshine duration in the month |
| m_sxd | the day with the maximum sunshine duration |
| m_dsf20 | number of days when the sunshine duration is less than 20 % of the astronomic sunshine duration |
| m_dsf80 | number of days when the sunshine duration is more than 80 % of the astronomic sunshine duration |
| 1990. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 72.8 | 8.5 | 1990-01-23 | 20 | 4 |
| February | 181.7 | 10.3 | 1990-02-25 | 5 | 12 |
| March | 198.4 | 10.5 | 1990-03-17 | 6 | 8 |
| April | 181.3 | 12.9 | 1990-04-30 | 10 | 5 |
| May | 273.8 | 13.9 | 1990-05-30 | 3 | 7 |
| June | 246.3 | 13.9 | 1990-06-30 | 6 | 8 |
| July | 304.2 | 14.1 | 1990-07-05 | 1 | 11 |
| August | 318.5 | 13.2 | 1990-08-05 | 2 | 19 |
| September | 185.0 | 10.8 | 1990-09-06 | 6 | 6 |
| October | 179.0 | 10.1 | 1990-10-11 | 9 | 10 |
| November | 61.4 | 9.0 | 1990-11-05 | 18 | 2 |
| December | 45.5 | 7.3 | 1990-12-03 | 23 | 2 |