ADS is glitched or something is really going on.
No military planes over continental USA
That is a compression longitudinal wave following the same axis as the normal wave. (like a slinky in and out as apposed to the slinky stretched out and shook up and down).
I mean one wave embedded in another - one like a sine wave we mostly know and one 90 degrees apart pushing in and out instead of up and down (compression).