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
1964.m_ssm_sxm_sxdm_dsf20m_dsf80
January48.97.61964-01-28231
February106.58.71964-02-23134
March75.39.21964-03-01181
April210.212.91964-04-1886
May250.314.11964-05-25711
June316.314.41964-06-0629
July321.914.31964-07-07316
August280.913.31964-08-07614
September214.111.41964-09-0559
October137.910.61964-10-04115
November68.87.71964-11-19172
December44.66.81964-12-23220