Hou could i get CAT021 data with my Radarcape

Im new one
I have no idea how to get CAT021 with my radarcape
i could get DF11,DF17,DF18 by using UDP and connect to port 10004
what I need is to get the speed,position of the plane, maybe CAT021 can help me
so can anyone help me to get CAT021 or get information of plane with DF17?

Try emailing jetvision.de directly or looking on wiki.modesbeast.com/Radarcape:Contents
They have been pretty helpful to me.