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
1920.m_ssm_sxm_sxdm_dsf20m_dsf80
January67.37.81920-01-15183
February134.59.21920-02-2882
March145.810.01920-03-22113
April205.511.71920-04-1663
May334.414.61920-05-20319
June230.614.31920-06-2955
July296.114.61920-07-07613
August244.914.01920-08-0338
September188.811.01920-09-0971
October173.39.21920-10-1157
November64.88.61920-11-01182
December16.26.91920-12-19291