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
January34.76.91970-01-29250
February50.57.61970-02-06200
March86.19.71970-03-30190
April158.910.61970-04-2390
May162.913.61970-05-25121
June252.114.31970-06-2054
July262.013.51970-07-26610
August236.612.31970-08-1853
September186.710.81970-09-1455
October144.09.51970-10-07106
November90.98.01970-11-12132
December36.05.01970-12-05210