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CoastColour on-demand processing Help pages


L2R Processing

The Level L2R product is the result of the atmospheric correction. It contains water leaving reflectance, normalised water leaving reflectance and different information about atmospheric properties.

Processor input: The processor takes L1 data as input:

  1. this can be MERIS L1b in N1 format or
  2. CoastColour L1P from L1P processing  alike.
    This is the only way to further process "ICOLized" products.

<Input from processings comes here>

Processor output: CoastColour L2R products in the selected format (NetCDF, GeoTIFF, or BEAM-DIMAP).

There is an important switch in the processor parameters: the type of the output reflectances. You can select if water leaving reflectances shall be written as radiances Rw or irradiances RLw. The irradiances ( = radiances multiplied by PI) are compatible with the standard MERIS product.
Pictured below are the two different input types and reflectances:

Selection of the L2R processor

In order to use the L2R processor for production, it must be selected from the Level-2 processors list. Make sure that the checkbox   is checked:

Parameters of the L2R processor

Below the processor selection area, there is a desription block which describes the processor and its parameters.
Unfold the text block for the contents to be displayed:

Please note that the processing steps of the L1P processor are implicitly included if the processing starts from a MERIS L1b product.
That's why they appear here as well. If you need to change the default values of the processor, you have two possibilities.
In the "Level-2 Parameters" section:

  1. Upload a file containing the parameters in an XML structure.
    Pictured below, we have uploaded a file "L2R_params.xml". Or
  2. Click on "Edit Parameters". This brings up the parameter editor.

Either way, after uploading or editing of the parameters, they are displayed in the text box in an XML structure:

Choose file Edit parameters


You can copy the contents of the text box as a parameter file template for the upload.