"The fictional micro-satellite shown here is in a fictional 500 mile high, sun-synchronous polar orbit with a period 100 minutes. Its circular comms footprint on the ground has a diameter of 50 degrees, which pretty much covers the Northern Hemisphere. The Earth rotates at 15 deg/hour, so in 100 minutes,"...
What is the author some kind of rocket scientist? ;)
I play one on TV.
LOL! :D