TRACERS is a cool program. Studying space weather like this is such a perfect example of NASA's science mission being helpful for everyone in space and everyone on Earth that uses those services.
The launch being a NASA rideshare with 3 other NASA missions, an ESA one, and a private one, is also really cool.
It still kills me that the launch was delayed by an FAA power outage, when the Skykraft sats on board are for air traffic control and could have helped with that exact problem.