Very cool. I did something similar with an ESP8266, and an iftt web hook configured to flash the hue lights in my house and SMS me. I think texting is no longer offered by iftt.
could someone please explain this, i wish i could say i get it, but i am so confused. i don't understand, are they not using gps just to synchronize the clocks on both ends? what does it matter if in orbit the distance seems shorter or longer if observed (viewed) from the satellites (is this what they are saying?)?