[mlindner]

That's simply impossible. You must be seeing something else. They aren't that bright.

[clumsysmurf]

Its very obvious once you know what to look for, they are identical to the simulation at the top of the page below:

https://en.wikipedia.org/wiki/Satellite_flare

Evenly spaced, every 20-30 seconds. Very, very bright at peak reflectivity, with easing in / out. I have no idea what kind of satellite it is though.