I live by an airport. If this were "normal," I would see contrails and chemtrails all day. The entire day can have a clear blue sky. But there will be chemtrails at dawn or dusk.

Goals? Obfuscation of the sun. Certain elements enhance signals, such as barium in the trails (similar to CT scans and x-rays). Fog of war (literally).

https://apps.dtic.mil/dtic/tr/fulltext/u2/a333462.pdf

There aren't always electrically charged particles in the ionosphere, so they cheat. Given our true technologies, this would all seem to be overkill.