I hope this place is appropriate to ask that question
in article from the last period –
[Data Service Platform for Sentinel-2 Surface Reflectance and Value-Added Products: System Use and Examples](http://www.mdpi.com/2072-4292/8/11/938) its say that ““Atmospherically-corrected bottom-of-atmosphere (BoA) Sentinel-2 data are produced using the Sen2Cor processor (currently version 2.2.1), developed by ESA to perform atmospheric, terrain, and cirrus correction of top-of-atmosphere Level-1C input data . The processor is considered a prototype and not validated for water and coastal regions””
My question is what is meant by coastal regions -how What is the range from the sea that the atmosphere correction wil not work good?
Thank you for the help