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Quality Control

daily radiation data section hourly radiation data section
single day several days single hour several hours

HELP


The general procedure is as follows. Enter properties of the station. Enter one or more irradiation values. Then click on "PROCESS DATA" button.


How to fill in the form - station coordinates

    The geographical location (latitude, longitude) has to be given in decimal degrees positive to the north and east
    (e.g. 60.4  and   5.32   for the station of Bergen in Norway)
    Height above sea level has to be given in meters
    (e.g.    41   for Bergen).
How to fill in the form - Linke Turbidity

    The Linke Turbidity Factor (TL) describes the optical state of the atmosphere for clear skies. The TL for an air mass of 2 (TL AM2) is needed as an input to the clear sky model. TL (AM2) generally ranges from 2.0 (for a clean and dry atmosphere) to 6.0 (for a humid and polluted atmosphere). Its smallest value is 1.0, for a completely clean and dry atmosphere.
    A TL of 1.0 is recommended. It will result in the smallest number of rejected station data values, thus making the number of falsely rejected data relatively small (see acceptance criteria for more information).
How to fill in the form - model

    With the model parameter, you may choose between two different clear sky models to compare your data with.
    0.0 results in a merely geometrical model while -1.0 tries to take into account atmosphere refraction. The difference between both models is only marginal; the latter might be more precise, when the sun elevation is small (eg. at sites near the poles or at sunrise and sunset).
How to fill in the form - time coordinates

    Year is the full number (counted AD) of the year in which the measurement was made
    (e.g. 1789  for the year of the human rights declaration)
    Month is the number of the month in this year
    (e.g.     8  for August).
    Day is the number of the day of this month
    (e.g.    26  for the 26 of August).
    Hours are counted in integers from 0 to 23.
    (e.g.    14  for the hour between 14:00 and 15:00).
    Time system is universal time (UT) or true solar time (TST) according to your choice. The use of TST is recommended. Due to insufficencies in the underlying function libraries, the use of UT might provoke a refusal to process some of the hourly data.
How to fill in the form - value of the measurement

    The irradiation has to be given in [Wh/m2]
    (e.g.  634.37  for 634.37 Wh/m2).
How to fill in the form - bulk of radiation data

    In the forms for several daily values or several hourly you have to put your data into a large text area. You can achieve this by typing it into the text area or - much more convenient ...- by using your browsers or your operating systems 'copy & paste' functions. Make sure that your radiation data is in the right format.

    Format and units of bulk of daily radiation data :

    Each line of your data bulk has to be initiated by the year and the month, followed by at least 1 and at most 31 daily radiation data values.
    Each line has to be terminated by a <return> (ASCII-Code: #hex 0A). The items of each line are separated by one or more of the characters you may specify in the separators' textfield (a <space> is recommended).
    See time format and measurement format.
    Day counting will start at '1st day of this month' for the first value you supply after the 'month'. You are allowed to supply less than 31 radiation values, but the algorithm will still start to count days at '1rst day' for the first value. You can set '-999' as value for days which you don't want to supply.

    The following example supplies the first 8 days of August 1789 and the days 3 to 11 for April 1998 :
    1789 8 297 234.45 324 345 346 367 388 534.37 
    1998 4 -999 -999 233.7 324.3 432 42.0 435 6765 4345 3453 646
     
     
    Format and units of bulk of hourly radiation data :

    Each line of your data bulk has to be initiated by the year, the month and the day, followed by at least 1 and at most 24 hourly radiation data values.
    Each line has to be terminated by a <return> (ASCII-Code: #hex 0A). The items of each line are separated by one or more of the characters you may specify in the separators' textfield (a <space> is recommended)..
    See time format and measurement format.
    Hour counting will start at '1st hour of this day' for the first value you supply after the 'day'. You are allowed to supply less than 24 radiation values, but the algorithm will still start to count hours at '1st hour' for the first value. You can set '-999' as value for hours which you don't want to supply.

    The following example supplies the first 8 hours of 8 August 1789 and the hours 3 to 11 for 1 April 1998 :
    1789 8 8 297 234.45 324 345 346 357 388 534.37  
    1998 4 1 -999 -999 233.7 324.3 432 42.0 435 6765 4345 3453 646
                                                                     

 


Updated: 10/13/06

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