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
1971.m_ssm_sxm_sxdm_dsf20m_dsf80
January20.65.61971-01-25270
February66.97.21971-02-12160
March81.49.31971-03-12181
April174.712.01971-04-29104
May244.513.71971-05-2566
June241.613.71971-06-1542
July270.214.01971-07-0935
August284.412.71971-08-15212
September169.710.71971-09-0471
October172.29.31971-10-0843
November40.98.11971-11-05241
December45.46.61971-12-24220