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
1989.m_ssm_sxm_sxdm_dsf20m_dsf80
January53.96.91989-01-19200
February62.78.61989-02-22181
March136.510.31989-03-26142
April157.810.11989-04-1370
May226.413.31989-05-2286
June219.013.31989-06-1072
July275.913.21989-07-2135
August189.811.01989-08-1080
September176.411.11989-09-0173
October165.49.01989-10-1372
November105.67.41989-11-18132
December84.77.01989-12-10131