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
1974.m_ssm_sxm_sxdm_dsf20m_dsf80
January44.15.91974-01-06240
February90.98.71974-02-17143
March173.510.81974-03-2195
April176.711.51974-04-08115
May187.513.81974-05-27114
June194.813.91974-06-0393
July265.013.71974-07-0659
August273.512.51974-08-0437
September198.811.31974-09-0644
October74.78.81974-10-19201
November99.47.71974-11-16131
December43.16.41974-12-06210