.. _products:

Products
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There are many parameters that can be used to assess the condition of a body of water. Some of these can be determined from satellite imagery. 
This section lists the parameters available on the platform and explains their purpose.

Water quality is described by 3 types of products:

* *Remote sensing reflectances* : **The Remote Sensing Reflectances (Rrs)** product provides the bottom-of-atmosphere reflectances of waters i.e. after atmospheric correction and taking into account the sunglint removal. It is the direct radiometric equivalent of light measurement onfield.
* *Surface temperature* : The **Temperature of the skin of water (Tskin)** product derives the dynamic temperature of the very first microns at the surface of the water.
* *Bio-optical parameters* : The bio-optical parameters include several products relative to the quality of the water such as **Transparency (Kd, Zsd), Turbidity, Suspended Particulate Matter concentration (SPM) or Chlorophyll-a concentration (Chla)** directly usable by end-users.

The biogeochemical parameters are derived from Sentinel-2 satellite imagery, whilst the temperature is derived from Landsat 8 and 9 imagery.
Once a week, the processing chain detects new satellite products and runs atmospheric corrections to produce L2A products and the algorithms to produce the parameters .


For more information on the various parameters, please see the following pages.

.. toctree::
   :maxdepth: 2
   :caption: Contents:
   
   rrs
   tskin
   transparency
   chla
   spm