Now we have everything ready to unpack the data, which is a straightforward but somewhat tedious process:

1. create a directory named after the ODF (this name is not required, but will simplify life):

   cd /scratch/phsdak/xmmodf
   mkdir 0112780401
   cd 0112780401
   tar xzvf ../0112780401.tar.gz
   

2. remove the original odf file:

   rm ../0112780401.tar.gz
   

3. locate the file ending on TAR:

   ls *.TAR
   

   this should give something like

   0193_0112780401.TAR
   

   where the first four letters are the XMM orbit, the remainder is again the obsid.

4. untar this file:

   tar xvf 0193_0112780401.TAR
   

   (note the missing z argument compared to above!). This produces again tons of files.

5. remove the TAR file:

   rm 0193_0112780401.TAR