upload-processor.md

@@ -3,9 +3,20 @@
 
 # Part 4 - Upload and run your own processor
 
-1.     Create your own processor. Here we will use a shell processor "proc1.sh" (don't forget to put #!/bin/sh at the beginning). This script will take two arguments in input and write the result in a text file.
-(You must use the environment variable $CTEP_OUTPUT_DIR).
+In this section, we learn how to integrate a new processor on the CTEP.
+
+Suitable processors include:
+* Linux executables
+* shell scripts
+* python scripts
+Other script languages can be supported, please contact us if you have a specific need.
+
+In a first step, we start with a very basic shell script which adds two integers and returns the result in a text file. This example illustrates how the integration mechanism works.
+
+The shell script is the following:
 ![im33](https://gitlab.acri-cwa.fr/coastal-tep/tutorial/raw/master/images/part4/im33.png)
+
+
 2.     Compress your file (tar.gz)
 3.     Go to the geobrowser and login with your ESA SSO account: [https://coastal-tep.eo.esa.int/geobrowser/](https://coastal-tep.eo.esa.int/geobrowser/).
 4.     Go to the uploading processor interface [https://coastal-tep.eo.esa.int/wps/ui/#/](https://coastal-tep.eo.esa.int/wps/ui/#) and click on the New button.