| 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 |
| 1973. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 52.2 | 7.9 | 1973-01-01 | 21 | 2 |
| February | 53.6 | 7.8 | 1973-02-03 | 19 | 1 |
| March | 151.6 | 11.1 | 1973-03-30 | 12 | 6 |
| April | 166.6 | 11.7 | 1973-04-16 | 10 | 3 |
| May | 283.0 | 14.0 | 1973-05-29 | 4 | 9 |
| June | 212.2 | 14.2 | 1973-06-13 | 9 | 3 |
| July | 247.9 | 13.2 | 1973-07-19 | 3 | 3 |
| August | 271.2 | 12.7 | 1973-08-11 | 4 | 7 |
| September | 223.2 | 11.8 | 1973-09-11 | 4 | 9 |
| October | 192.6 | 10.4 | 1973-10-05 | 7 | 11 |
| November | 113.8 | 9.1 | 1973-11-02 | 13 | 6 |
| December | 73.3 | 6.9 | 1973-12-10 | 16 | 1 |