Satellite messaging

[SGM]

 
On the weekend, I noticed "satellite" appearing on my phone two different ways whilst flying and using Avplan (with SkyEcho + ADSB). 

I thought I would investigate and share the findings here.

The first image at 2:57 pm is my Telstra iPhone indicating I can send SMS by Satellite, albeit with a reasonably weak signal.  After some investigation, this will show when you can't get a connection to the normal Telstra network, but can connect to Starlink, so SMS will work not apps or voice calls



The second image at 3:10pm is my (any-mobile-provider) iPhone indicating I can send Apple emergency 000 messages via their GlobalStar coverage.  This means I was most likely in a gap between Starlink satellites, which is generally only a minute or so, but there was a Globalstar satellite visible to my phone.


Since I also have a PLB in the aircraft, and a Zoleo (mostly used by my daughter for hiking), I thought I would put all four options in a table.

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