[tajen]

I wonder as well what is the zone he’s talking about, but he talked about the zone in 9m/s2, not F=mv^2. I guess the first one extends up to 100km altitude, where I think geostationary satellites are, and indeed is very closeby.

Edit : Low earth orbit is 180+km, for weather satellites because they revolve in 99 minutes. Geostationary orbit seems to be around 36000km with a speed of 3000m/s. https://earthobservatory.nasa.gov/Features/OrbitsCatalog/