Some persons pick to keep a satellite phone as component of their disaster preparedness kit. An earthquake, hurricane, terrorist attack, or many other issues can disrupt both normal landline cellular phone and wireless mobile cellular phone assistance. But - in theory - satellite cell phone service must be able to survive all such disasters, mainly because the satellites are safely distant, somewhere way up inside sky.
Even so, satellite cell phone service also has an Achilles Heel. That will be the point at which a phone contact is routed in the satellite that received your signal towards the ultimate individual you are calling. From the circumstance of most services, your phone is routed from the satellite and instantly to its closest ground station, and then it goes from the ground station, as ideal it can, to its last desired destination. If its last destination is yet another satellite phone, it travels back as much as one more satellite and down towards the cellular phone, wherever it may well be.
This signifies, for most satellite phone solutions, there remain ground based vulnerabilities. However, Iridium will be the notable exception to this. If you are calling to one more Iridium mobile phone, your call goes straight out of your cellular phone towards closest available satellite , then is routed between the satellites until reaching a satellite that may then beam the contact down towards the recipient.
This capability can make Iridium essentially the most robust community for handling ground dependent disasters.
In theory an individual Iridium satellite can handle as much as about 1100 calls simultaneously, and also the total Iridium community some thing much less than 66 times this amount. These are not quite large numbers, but neither could be the total installed dependent of Iridium users quite significant, so one particular would expect that, in some kind of regional emergency, the Iridium network could manage its users' requirements without having appreciable congestion.
A very good instance of this was with Hurricane Katrina. The hurricane knocked out more than three million landline circuits and over 1000 mobile sites. 3 weeks later, only 60% from the cellular cellular phone networks had been operational and two million calls had been nonetheless failing. On the other hand, Iridium's community was completely unaffected, and for your very first 72 hours of Katrina, Iridium visitors from the Gulf area greater far more than 3000%. The number of subscribers in impacted areas grew 500%.
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