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
1999.m_ssm_sxm_sxdm_dsf20m_dsf80
January54.87.21999-01-28210
February78.69.31999-02-27141
March168.610.21999-03-2584
April177.811.71999-04-20104
May251.212.81999-05-1954
June213.913.91999-06-2663
July272.013.21999-07-0558
August254.311.91999-08-2234
September216.111.31999-09-1117
October125.79.61999-10-15143
November42.18.51999-11-01221
December71.77.61999-12-06182