# Satellite Positions

Satellite positions can be expressed in various
coordinate systems.
WinOrbit uses the following positions:

* Latitude/Longitude/Altitude

* Inertial (Celestial) Cartesian system

* Geodetic Cartesian system.

The *state vector* published by NASA for Shuttle operations is an
*Earth-fixed Greenwich*, or *Geodetic* position. The NASA state
vector E, F, and G values (in feet) can be obtained from the **WinOrbit**
Geodetic position by multiplying by 3280.839895 feet/km.