Re:SpareOne: Emergency mobile phone powered by AA batteries
by srdeveng on Sunday May 15, 2016 @07:17PM
(#11703230)
SPOT uses Globalstar.
Argument against Globalstar is that it is not a true polar to polar real-time solution like Iridium.
Iridium is the only constellation where you will always find a bird overhead anywhere on the globe (with a ground station relay)
Realistically, Iridium has occasional (~5min) signal gaps likely due to the aging constellation (based on my own use cases developing with a roof mounted antenna)
Argument against Globalstar is that it is not a true polar to polar real-time solution like Iridium.
Iridium is the only constellation where you will always find a bird overhead anywhere on the globe (with a ground station relay)
Realistically, Iridium has occasional (~5min) signal gaps likely due to the aging constellation (based on my own use cases developing with a roof mounted antenna)