Interesting article/
Reston, Virginia-based Satelles has been broadcasting timing and location signals since 2016 through a channel Iridium’s satellites in low Earth orbit previously used for paging.
These signals are a thousand times more powerful than those from U.S.-based GPS satellites and other global navigation satellite systems (GNSS), Iridium CEO Matt Desch said during a media briefing.
Theses low earth orbit satellites can also be used for 5G signals according to the article.