Get the latest tech news
GPS constellation as a way to image the ionosphere (2011)
While we all know about the GPS constellation of 32 satellites orbiting the Earth in MEO that provide coordinates to our smartphones ( ha...
Here is an animated gif version of the solving of this inverse problem. The sensor network is made of 32 satellites plus any number of antennas on the ground.and its size scales directly with the size of the earth.
Or read this on Hacker News