Below are movies of the brightness of future satellite megaconstellations, made from the simulations in Lawler, Boley, & Rein (submitted).

The code to make these simulations is open-source and publicly available in this github repository, and a simple webapp is available here.

Latitude 50 degrees North (southern Canada/mid-Europe/Russia)

Latitude 20 degrees North (Hawaii, where lots of research telescopes are located)