The interface between Earth and space is the Ionosphere, a region of rarified gas and charged particles. It is very important for radio communications, radar, satellite signals and global positioning. Yet we know so little about it especially when it disrupts all these signals in a regular fashion. Too high for planes or balloons, it's up to satellites to study this rarified region.
The New Frontier S3E10 Screenshot
Everything Deserves High Definition
(Except Big Brother)