Select the INCORRECT statement from the following, regarding GPS.

Concepts:

The Global Positioning System (GPS) is a satellite-based navigation and surveying system for the determination of precise position and time. The following are some features of GPS:

1. It used radio signals from the satellites to determine the position and time of an object.
2. The Space Segment of GPS contains 24 satellites, in 12-hour near-circular orbits at an altitude of about 20,000 km.
3. A minimum of 4 satellites are required in the view from any point on the earth at any time for 3-D positioning.
4. The nominal orbital period of GPS Satellite is one-half of sidereal days or 11 h 58 min.
5. The orbits are nearly circular and equally spaced about the equator at a 600 separation.
6. The orbital radius is approximately around 26,600 km.
7. A TRANSIT user at the equator can obtain a position fix at an average of about 10 minutes.