Hourly irradiation measured at El-Farafra station, Egypt (2004-2010)

Irradiation data has been filtered to remove suspicious data. Each measurement is flagged (columns 6, 8, 10): \"0\": passed - Measurement has successfully passed the quality control. \"1\": failed - Measurement is outside the range of expected extreme values. \"2\": failed - Measurement is greater than rarely observed values. \"3\": failed - Measurement is greater than rarely observed values and outside the range of expected extreme values. \"4\": suspicious - Though measurement passed the tests, further visual screening casts doubts on its validity. \"5\": night values.