diff --git a/conf/configuration.properties b/conf/configuration.properties
index 45befbd2d24a5908afdd9b93edc2c5d5d22ca2c7..371bb8b0dca4e419788d09db802449499a15bcde 100644
--- a/conf/configuration.properties
+++ b/conf/configuration.properties
@@ -1,6 +1,5 @@
 # Inputs
 s2_folder = S2A_MSIL2A_20201129T110421_N0214_R094_T30TXQ_20201129T135030.SAFE
-#s2_folder = /projects/read_s2/input/MTD_MSIL2A.xml
 
 
 # Outputs
diff --git a/doc/documentation.md b/doc/documentation.md
index 938285b1987bcec772485240534bac063160d198..dc16657d986d3657890628b1fd03e80c9e413808 100644
--- a/doc/documentation.md
+++ b/doc/documentation.md
@@ -1,27 +1,23 @@
 ## Short description of the algorithm
-
+Downloads the S2 _ ***.SAFE.tar folder from S3 and untar it. Then reads the Sentinel 2 metadata (MTD_MSIL2A.xml and MTD_TL.xml) and creates the dictionaries:* Bands_10m.pkl : all path to data with 10 meters resolution 
+* Bands_20m.pkl : all path to data with 20 meters resolution 
+* Bands_60m.pkl : all path to data with 60 meters resolution 
+* Tile_metadata.pkl : all informations about the tiles
+* Mask_esa.pkl : all path to ESA masks
 
 
 ## Description of data used
 *  Description of inputs
+    * **s2_folder**: name of the S2 folder in S3 (S2_***.SAFE without the .tar)
 
 
 *  Description of outputs
-
-
-
-## Description of the different functions
-*  Function 1
-    *  Short description
-    *  Description of inputs
-    *  Description of outputs
-
-
-*  Function 2
-    *  Short description
-    *  Description of inputs
-    *  Description of outputs
-
+    * **output**: path to the read_s2 output directory
+    * **bands_10m**: name of the dictionary for data with 10 meters resolution 
+    * **bands_20m**: name of the dictionary for data with 20 meters resolution 
+    * **bands_60m**: name of the dictionary for data with 60 meters resolution 
+    * **tile_meta**: name of the dictionary for informations about the tiles 
+    * **mask_meta**: name of the dictionary for ESA masks