How is TikTok able to screen this en masse? Are they going after tags? Political issues aside, I am really interested in the technical background in this.
They mean the intersection between the cone produced by the satellite and "illuminated" surface. If the antenna beam is normal to the sphere, it will produce a disk which has an diameter.
Well, now you are double counting the end values of the ranges. In your example 1 is included in both 0-1 and 1-2.