Google 'Narrowband' and 'Broadband' satellite constellations and read a couple of hits that sound like they might explain the difference in terms of a competitive marketplace, and that will almost double your current understanding of SAS. Your previous posts demonstrate a hole in your reading that needs to be filled.
No offence taken by the way, it's just annoying when new posters to the stock make grand statements like "SAS have competition" when their posts clearly demonstrate that they haven't even taken the time to read through the offerings on Hot Copper. This bit has been done to death.