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
1997.m_ssm_sxm_sxdm_dsf20m_dsf80
January31.87.11997-01-29260
February109.29.61997-02-28113
March210.010.81997-03-0846
April183.012.41997-04-14104
May268.213.91997-05-23610
June266.014.31997-06-2838
July221.714.01997-07-0285
August241.112.81997-08-1157
September260.311.41997-09-06211
October164.59.51997-10-0686
November68.48.61997-11-04191
December39.17.01997-12-30221