07-04-12, 09:42 AM
The equatorial circumference is 24,900 miles.
The ISS at an altitude of 240 miles would then be travelling roughly an extra 2.π.240 miles on top of that... roughly 1500 miles for a total orbital track of 26,400 miles.
Which, at an average 17500mph results in an orbit of 90.5 minutes. A near enough approximation since the orbit isn't perfectly circular.
The ISS at an altitude of 240 miles would then be travelling roughly an extra 2.π.240 miles on top of that... roughly 1500 miles for a total orbital track of 26,400 miles.
Which, at an average 17500mph results in an orbit of 90.5 minutes. A near enough approximation since the orbit isn't perfectly circular.