NASCAR on Tuesday unveiled its 2015 schedules and the 36-race calendar for its premier Sprint Cup Series includes a three-race Western swing in March.
Geosynchronous - An orbit around Earth whose orbital period is equal to a sidereal day (23 hours, 56 minutes), irrespective of its inclination. - A person on a point on Earth, will see a satellite in this orbit in the same place in the sky at the same time of the day, everyday.
1 Semi-synchronous orbit: An orbit with an orbital period equal to half of the average rotational period of the body being orbited and in the same direction of rotation as that body. 2  For Earth this means a period of just under 12 hours at an altitude of approximately 20,200 km (12,544.2 miles) if the orbit is circular. Geosynchronous orbit (GSO): An orbit around the Earth with a period equal to one sidereal day, which is Earth's average rotational period of 23 hours, 56 minutes, 4.091 seconds. 2  For a nearly circular orbit, this implies an altitude of approximately 35,786 kilometers (22,236 mi).