NASA firing rockets during the eclipse

I just read an article that NASA will be firing 3 rockets during the eclipse to study the changes in temperature during that time or some BS. The project is named APEP after a serpent deity. If that's not obvious idk what is. Here's the article I read https://www.forbes.com/sites/jamiecartereurope/2024/03/26/why-nasa-will-fire-three-rockets-at-the-solar-eclipse/?sh=5b901043d199.

Anyways, I think it would interesting to know their true intentions behind launching the rockets during the eclipse.