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
1981.m_ssm_sxm_sxdm_dsf20m_dsf80
January128.38.41981-01-2784
February128.89.71981-02-26116
March169.411.11981-03-28104
April213.512.71981-04-2249
May221.712.81981-05-0766
June241.114.81981-06-3067
July284.114.31981-07-0237
August267.313.11981-08-0628
September166.411.51981-09-0694
October129.910.21981-10-08112
November79.28.01981-11-03162
December26.44.71981-12-05240