We have these trails of electrons left behind, and the wind in the upper atmosphere causes them to drift. It pushes them one direction or another. We can measure the speed at which those electrons are drifting and infer the wind speed.
There are always things we are trying to improve. We always want to make the measurements better. Every year, we take incremental steps so that we have better data quality and a more reliable system. The longer it runs, the more we learn about how to make it better.
Very little is known about this region because it hasn't been well measured, especially in the polar regions.
It's a nice way to have the family together.
In order to understand the atmosphere as a whole, we have to understand how the layers of the atmosphere are coupled. We're trying to get our hands around the fundamental physical processes that are important to this region.