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
1990.m_ssm_sxm_sxdm_dsf20m_dsf80
January39.67.91990-01-27231
February145.59.51990-02-2077
March173.410.21990-03-1855
April162.812.01990-04-28104
May262.713.11990-05-1934
June206.313.21990-06-2461
July283.113.21990-07-1547
August310.212.51990-08-05215
September186.910.91990-09-0662
October152.68.91990-10-10101
November51.17.41990-11-05210
December40.16.91990-12-06211