Description of elements in the header
m_ssamount of monthly sunshine duration
m_sxthe maximum sunshine duration in the month
m_sxdthe day with the maximum sunshine duration
m_dsf20number of days when the sunshine duration is less than 20 % of the astronomic sunshine duration
m_dsf80number of days when the sunshine duration is more than 80 % of the astronomic sunshine duration
1980.m_ssm_sxm_sxdm_dsf20m_dsf80
January55.97.91980-01-28211
February76.77.11980-02-02150
March93.59.91980-03-31160
April122.912.51980-04-16184
May221.414.21980-05-1295
June244.914.71980-06-1223
July240.913.21980-07-1262
August255.813.11980-08-07510
September161.811.21980-09-0482
October139.410.21980-10-0494
November57.87.41980-11-11210
December72.17.01980-12-29162