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
1970.m_ssm_sxm_sxdm_dsf20m_dsf80
January23.56.51970-01-29260
February45.97.71970-02-17200
March80.39.11970-03-17170
April155.111.91970-04-16123
May199.913.51970-05-25104
June250.514.11970-06-1446
July235.613.41970-07-1296
August241.212.71970-08-1354
September199.310.61970-09-0723
October133.39.11970-10-06100
November58.87.71970-11-04190
December33.56.81970-12-10250