My friend @[100002467572818:2048:Ari Krupnik], has developed DISH, a zero-configuration timecode generator. It uses real-time satellite data to easily sync any number of cameras, using the open source Linear Time Code software package, LTCsync. He's raising money for the first production run. If you think it's something that would be useful to you (or your filmmaker friends), please check it out and consider donating.
https://www.kickstarter.com/projects/ari-krupnik/dish-timecode-sync-by-satellite
https://www.kickstarter.com/projects/ari-krupnik/dish-timecode-sync-by-satellite