[wyldfire]

The doppler shift described at ~14:45 was a really interesting component of Iridium that I recall when I learned about it many years ago.

These guys are great, this was an enjoyable presentation.

[misterdata]

The doppler shfit also supposedly provided a clue about the whereabouts of MH370 after it disappeared: https://theaviationist.com/2014/03/27/inmarsat-helps-finding...

[jandrese]

To be fair, that wasn't Iridium, that was INMARSAT. Completely different company with a very different satellite system.