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
January47.37.21989-01-02211
February64.48.51989-02-12181
March159.711.21989-03-27108
April148.712.01989-04-19102
May204.313.11989-05-1274
June199.813.61989-06-1072
July297.114.41989-07-0818
August210.112.81989-08-1783
September173.711.11989-09-1374
October184.89.71989-10-1756
November98.08.01989-11-05114
December60.06.41989-12-11180