| 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 | 44.1 | 7.0 | 1973-01-13 | 22 | 0 |
| February | 88.7 | 8.8 | 1973-02-19 | 13 | 2 |
| March | 117.5 | 10.4 | 1973-03-23 | 14 | 1 |
| April | 130.9 | 12.4 | 1973-04-30 | 13 | 2 |
| May | 272.3 | 13.7 | 1973-05-13 | 5 | 6 |
| June | 225.3 | 14.0 | 1973-06-26 | 8 | 5 |
| July | 301.6 | 14.1 | 1973-07-17 | 2 | 8 |
| August | 249.6 | 13.4 | 1973-08-09 | 4 | 10 |
| September | 203.4 | 11.6 | 1973-09-05 | 7 | 13 |
| October | 176.5 | 10.6 | 1973-10-06 | 11 | 8 |
| November | 135.3 | 9.4 | 1973-11-01 | 10 | 9 |
| December | 77.8 | 7.5 | 1973-12-01 | 15 | 3 |