Check Irradiation

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The service receives a text file containing the data as sole input. There is one line per day and per location in the file. All values are separated by semicolon, also known as CSV format. The lines are not necessarily ordered by date or location. Several locations may appear in the same file. The file contains

  • Date in ISO format, e.g. 2005-01-02T00:00:00. Here the time following letter T is useless and can be set to 00:00:00 or any other value. Time is UT,
  • Latitude and longitude obeying ISO standard, i.e. positive latitude for North, and positive longitude for East, e.g. 12.76, -14.52,
  • Elevation above mean sea level, in m,
  • Summarization period following ISO standard. P01D means: period (P) is 01 day (D),
  • Daily means of irradiance, e.g. 222.3,
  • Unit: W/m2, Wh/m2 and J/m2 are accepted

The following lines are an example of the input format:

  • 2005-03-13T00:00:00;12.76;-14.52;38;P01D;349.2;W/m2;
  • 2005-03-15T00:00:00;12.76;-14.52;38;P01D;566.2;W/m2;
  • 2005-03-16T00:00:00;12.76;-14.52;38;P01D;1722.6;W/m2;

The output is a text file that has three new columns in addition to the input data. The first additional column gives the value GHItoa, in W/m2, and the two others are the flags, one for extrema QCP and one for rare observations QCP. 0 means that the data is not flagged, i.e. is a plausible data, and 1 means that the data is flagged, i.e. is not plausible for this QCP. In the example given above, the output is the following:

  • 2005-03-13T00:00:00;12.76;-14.52;38;P01D;349.2;W/m2;422.017959;0;0
  • 2005-03-15T00:00:00;12.76;-14.52;38;P01D;566.2;W/m2;423.891244;0;1
  • 2005-03-16T00:00:00;12.76;-14.52;38;P01D;1722.6;W/m2;424.796441;1;1

where the daily mean of irradiance for 13th March is plausible for both QCPs, data for 15th March is outside the range of rare observation limits and the data for 16th March is outside the range of extreme limits, and, therefore the rare observations limits.

Inputs file: