| 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 | 37.7 | 7.5 | 1973-01-13 | 25 | 1 |
| February | 64.6 | 8.5 | 1973-02-19 | 18 | 1 |
| March | 158.6 | 10.8 | 1973-03-31 | 11 | 2 |
| April | 142.3 | 11.2 | 1973-04-30 | 12 | 2 |
| May | 269.0 | 14.1 | 1973-05-31 | 5 | 7 |
| June | 227.5 | 14.5 | 1973-06-18 | 9 | 7 |
| July | 265.8 | 14.1 | 1973-07-19 | 2 | 5 |
| August | 248.5 | 12.3 | 1973-08-11 | 5 | 6 |
| September | 212.7 | 11.8 | 1973-09-04 | 5 | 13 |
| October | 172.1 | 9.8 | 1973-10-07 | 8 | 3 |
| November | 136.1 | 8.7 | 1973-11-01 | 7 | 5 |
| December | 56.2 | 6.7 | 1973-12-01 | 19 | 0 |