I don’t want to capture this thread 
Let me just add another point to that issue: incorrect chosen NORAD-ID by the observer. This also recently happens and that would also make it impossible (and it is already by some of the satellites not having a proper spacecraft identifier in their packets - this is a huge issue with CSP transmissions! Why - the heck - is there a Cubesat Space Protocol without identifiers?) to identify the source of the transmitted data!