This looks really interesting.
By leveraging datacasting technology over a low-cost satellite constellation, Outernet is able to bypass censorship, ensure privacy, and offer a universally-accessible information service at no cost to global citizens. It’s the modern version of shortwave radio, or BitTorrent from space.
Outernet consists of a constellation of hundreds of low-cost, miniature satellites in Low Earth Orbit. Each satellite receives data streams from a network of ground stations and transmits that data in a continuous loop until new content is received. In order to serve the widest possible global audience, the entire constellation utilizes UDP-based multicasting over WiFi. Although still not common, WiFi multicasting is a proven technology, especially when the data requires only one hop to reach the recipient.