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
1973.m_ssm_sxm_sxdm_dsf20m_dsf80
January45.88.11973-01-31232
February110.58.51973-02-25111
March131.39.41973-03-25130
April147.012.61973-04-30112
May303.513.31973-05-0829
June251.714.41973-06-1855
July256.313.81973-07-1733
August264.113.51973-08-0959
September183.311.51973-09-0395
October162.89.41973-10-0765
November101.18.41973-11-01132
December53.96.11973-12-01180