Have you read the linked explanation from the STA request? The "tests" they are doing will put out more power than the satellite typically uses and will interfere with other satellites (for very brief periods of time). Having that interference source as far away from in service satellites makes sense.
Thanks for the PDF (had to make changes to my firewall to read it) makes perfect sense if they are going to overdrive the transponders. Hope it works!
Lots of peoples LiLs depend on it.